Month	Marks Per Metric Ton
1879-01-01	4.80000
1879-02-01	4.80000
1879-03-01	4.80000
1879-04-01	4.80000
1879-05-01	4.60000
1879-06-01	4.40000
1879-07-01	4.40000
1879-08-01	4.40000
1879-09-01	4.40000
1879-10-01	4.40000
1879-11-01	4.40000
1879-12-01	6.30000
1880-01-01	6.40000
1880-02-01	7.80000
1880-03-01	7.00000
1880-04-01	7.00000
1880-05-01	6.40000
1880-06-01	6.20000
1880-07-01	6.60000
1880-08-01	6.80000
1880-09-01	6.10000
1880-10-01	6.30000
1880-11-01	6.35000
1880-12-01	6.00000
1881-01-01	5.40000
1881-02-01	5.20000
1881-03-01	5.30000
1881-04-01	5.00000
1881-05-01	5.30000
1881-06-01	5.20000
1881-07-01	5.30000
1881-08-01	5.20000
1881-09-01	5.35000
1881-10-01	6.00000
1881-11-01	6.15000
1881-12-01	6.30000
1882-01-01	6.30000
1882-02-01	5.80000
1882-03-01	5.50000
1882-04-01	5.50000
1882-05-01	5.50000
1882-06-01	5.50000
1882-07-01	5.60000
1882-08-01	5.60000
1882-09-01	5.90000
1882-10-01	6.00000
1882-11-01	6.00000
1882-12-01	6.00000
1883-01-01	6.00000
1883-02-01	6.00000
1883-03-01	6.00000
1883-04-01	5.90000
1883-05-01	5.90000
1883-06-01	5.90000
1883-07-01	5.90000
1883-08-01	5.80000
1883-09-01	5.80000
1883-10-01	5.80000
1883-11-01	5.80000
1883-12-01	5.80000
1884-01-01	5.60000
1884-02-01	5.40000
1884-03-01	5.25000
1884-04-01	5.20000
1884-05-01	5.20000
1884-06-01	5.10000
1884-07-01	5.10000
1884-08-01	5.00000
1884-09-01	5.20000
1884-10-01	5.20000
1884-11-01	5.20000
1884-12-01	5.20000
1885-01-01	5.65000
1885-02-01	5.65000
1885-03-01	5.50000
1885-04-01	5.50000
1885-05-01	5.50000
1885-06-01	5.50000
1885-07-01	5.70000
1885-08-01	5.70000
1885-09-01	5.70000
1885-10-01	5.70000
1885-11-01	5.70000
1885-12-01	5.70000
1886-01-01	5.70000
1886-02-01	5.70000
1886-03-01	5.80000
1886-04-01	5.70000
1886-05-01	5.60000
1886-06-01	5.60000
1886-07-01	5.60000
1886-08-01	5.50000
1886-09-01	5.50000
1886-10-01	5.50000
1886-11-01	5.50000
1886-12-01	5.50000
1887-01-01	5.55000
1887-02-01	5.60000
1887-03-01	5.60000
1887-04-01	5.60000
1887-05-01	5.60000
1887-06-01	5.60000
1887-07-01	5.60000
1887-08-01	5.60000
1887-09-01	5.60000
1887-10-01	5.70000
1887-11-01	5.70000
1887-12-01	5.70000
1888-01-01	5.70000
1888-02-01	5.70000
1888-03-01	5.70000
1888-04-01	5.70000
1888-05-01	6.00000
1888-06-01	6.00000
1888-07-01	6.00000
1888-08-01	6.00000
1888-09-01	6.00000
1888-10-01	6.25000
1888-11-01	6.70000
1888-12-01	6.70000
1889-01-01	6.70000
1889-02-01	6.70000
1889-03-01	6.70000
1889-04-01	6.70000
1889-09-01	9.25000
1889-10-01	9.75000
1889-11-01	10.5000
1889-12-01	11.5000
1890-01-01	12.5000
1890-02-01	13.0000
1890-03-01	13.0000
1890-04-01	13.0000
1890-08-01	9.00000
1890-09-01	9.00000
1890-10-01	9.00000
1890-11-01	9.00000
1890-12-01	9.00000
1891-01-01	9.00000
1891-02-01	9.50000
1891-03-01	9.75000
1891-04-01	9.75000
1891-05-01	10.2500
1891-06-01	10.2500
1891-07-01	10.2500
1891-08-01	10.2500
1891-09-01	10.2500
1891-10-01	10.2500
1891-11-01	9.50000
1891-12-01	9.50000
1892-02-01	8.50000
1892-03-01	8.50000
1892-04-01	8.50000
1892-05-01	8.50000
1892-06-01	8.50000
1892-07-01	8.50000
1892-08-01	8.50000
1892-09-01	8.50000
1892-10-01	8.50000
1892-11-01	8.50000
1893-01-01	7.25000
1893-02-01	7.25000
1893-03-01	7.25000
1893-04-01	7.25000
1893-05-01	7.25000
1893-06-01	7.25000
1893-07-01	7.25000
1893-08-01	7.25000
1893-09-01	7.25000
1893-10-01	7.25000
1893-11-01	7.50000
1893-12-01	7.50000
1894-01-01	8.00000
1894-02-01	8.00000
1894-03-01	8.00000
1894-04-01	8.00000
1894-05-01	8.00000
1894-06-01	8.00000
1894-07-01	8.00000
1894-08-01	8.00000
1894-09-01	8.00000
1894-10-01	8.00000
1894-11-01	8.00000
1894-12-01	8.00000
1895-01-01	8.00000
1895-02-01	8.00000
1895-07-01	8.00000
1895-08-01	8.00000
1895-09-01	8.00000
1895-10-01	8.00000
1895-11-01	8.00000
1895-12-01	8.00000
1896-01-01	8.00000
1896-02-01	8.00000
1896-03-01	8.00000
1896-04-01	8.00000
1896-05-01	8.00000
1896-06-01	8.00000
1896-07-01	8.00000
1896-08-01	8.00000
1896-09-01	8.75000
1896-10-01	8.75000
1896-11-01	8.75000
1896-12-01	8.75000
1897-01-01	8.75000
1897-02-01	8.75000
1897-03-01	8.88000
1897-04-01	8.88000
1897-05-01	8.87000
1897-06-01	8.87000
1897-07-01	8.87000
1897-08-01	8.87000
1897-09-01	8.87000
1897-10-01	8.87000
1897-11-01	8.87000
1897-12-01	8.87000
1898-01-01	8.87000
1898-02-01	8.87000
1898-03-01	8.87000
1898-04-01	8.87000
1898-05-01	8.87000
1898-06-01	8.87000
1898-07-01	8.87000
1898-08-01	9.37000
1898-09-01	9.37000
1898-10-01	9.37000
1898-11-01	9.37000
1898-12-01	9.37000
1899-01-01	9.37000
1899-02-01	9.37000
1899-03-01	9.37000
1899-04-01	9.37000
1899-05-01	9.37000
1899-06-01	9.37000
1899-07-01	9.37000
1899-08-01	9.37000
1899-09-01	9.37000
1899-10-01	9.37000
1899-11-01	9.37000
1899-12-01	9.37000
1900-01-01	10.2500
1900-02-01	10.2500
1900-03-01	10.2500
1900-04-01	10.2500
1900-05-01	10.2500
1900-06-01	10.2500
1900-07-01	10.2500
1900-08-01	10.2500
1900-09-01	10.2500
1900-10-01	10.2500
1900-11-01	10.2500
1900-12-01	10.2500
1901-01-01	10.2500
1901-02-01	10.2500
1901-03-01	10.2500
1901-04-01	10.2500
1901-05-01	10.2500
1901-06-01	10.2500
1901-07-01	10.2500
1901-08-01	10.2500
1901-09-01	10.2500
1901-10-01	10.2500
1901-11-01	10.2500
1901-12-01	10.2500
1902-01-01	10.2500
1902-02-01	10.2500
1902-03-01	10.2500
1902-04-01	9.38000
1902-05-01	9.38000
1902-06-01	9.38000
1902-07-01	9.38000
1902-08-01	9.38000
1902-09-01	9.38000
1902-10-01	9.38000
1902-11-01	9.38000
1902-12-01	9.38000
1903-01-01	9.38000
1903-02-01	9.38000
1903-03-01	9.38000
1903-04-01	9.38000
1903-05-01	9.38000
1903-06-01	9.38000
1903-07-01	9.38000
1903-08-01	9.38000
1903-09-01	9.38000
1903-10-01	9.38000
1903-11-01	9.38000
1903-12-01	9.38000
1904-01-01	9.38000
1904-02-01	9.38000
1904-03-01	9.38000
1904-04-01	9.38000
1904-05-01	9.38000
1904-06-01	9.38000
1904-07-01	9.38000
1904-08-01	9.38000
1904-09-01	9.38000
1904-10-01	9.38000
1904-11-01	9.38000
1904-12-01	9.38000
1905-01-01	9.38000
1905-02-01	9.38000
1905-03-01	9.38000
1905-04-01	9.53000
1905-05-01	9.53000
1905-06-01	9.53000
1905-07-01	9.53000
1905-08-01	9.53000
1905-09-01	9.53000
1905-10-01	9.53000
1905-11-01	9.53000
1905-12-01	9.53000
1906-01-01	9.53000
1906-02-01	10.2500
1906-03-01	10.2500
1906-04-01	10.2500
1906-05-01	10.2500
1906-06-01	10.2500
1906-07-01	10.2500
1906-08-01	10.2500
1906-09-01	10.2500
1906-10-01	10.2500
1906-11-01	10.7500
1906-12-01	10.7500
1907-01-01	10.7500
1907-02-01	10.7500
1907-03-01	10.8800
1907-04-01	11.2500
1907-05-01	11.2500
1907-06-01	11.2500
1907-07-01	11.2500
1907-08-01	11.2500
1907-09-01	11.2500
1907-10-01	11.2500
1907-11-01	11.2500
1907-12-01	11.2500
1908-01-01	11.2500
1908-02-01	11.2500
1908-03-01	11.2500
1908-04-01	11.2500
1908-05-01	11.2500
1908-06-01	11.2500
1908-07-01	11.2500
1908-08-01	11.2500
1908-09-01	11.2500
1908-10-01	11.2500
1908-11-01	11.2500
1908-12-01	11.2500
1909-01-01	11.2500
1909-02-01	11.2500
1909-03-01	11.2500
1909-04-01	11.2500
1909-05-01	10.7500
1909-06-01	10.7500
1909-07-01	10.7500
1909-08-01	10.7500
1909-09-01	10.7500
1909-10-01	10.7500
1909-11-01	10.7500
1909-12-01	10.7500
1910-01-01	10.7500
1910-02-01	10.7500
1910-03-01	10.7500
1910-04-01	10.7500
1910-05-01	10.7500
1910-06-01	10.7500
1910-07-01	10.7500
1910-08-01	10.7500
1910-09-01	10.7500
1910-10-01	10.7500
1910-11-01	10.7500
1910-12-01	10.7500
1911-01-01	10.7500
1911-02-01	10.7500
1911-03-01	10.7500
1911-04-01	10.7500
1911-05-01	10.7500
1911-06-01	10.7500
1911-07-01	10.7500
1911-08-01	10.7500
1911-09-01	10.7500
1911-10-01	10.7500
1911-11-01	10.7500
1911-12-01	10.7500
1912-01-01	10.7500
1912-02-01	10.7500
1912-03-01	10.7500
1912-04-01	11.6300
1912-05-01	11.6300
1912-06-01	11.6300
1912-07-01	11.6300
1912-08-01	11.6300
1912-09-01	11.6300
1912-10-01	11.6300
1912-11-01	11.6300
1912-12-01	11.6300
1913-01-01	11.6300
1913-02-01	11.6300
1913-03-01	11.6300
1913-04-01	12.3800
1913-05-01	12.3800
1913-06-01	12.3800
1913-07-01	12.3800
1913-08-01	12.3700
1913-09-01	12.3700
1913-10-01	12.3700
1913-11-01	12.3700
1913-12-01	12.3700
1914-01-01	12.3500
1914-02-01	12.3600
1914-03-01	12.3700
1914-04-01	11.6400
1914-05-01	11.6400
1914-06-01	11.6500
1914-07-01	11.6400
1914-08-01	11.6500
1914-09-01	11.6600
1914-10-01	11.1500
1914-11-01	10.6000
1914-12-01	10.8500
1915-01-01	10.7500
1915-02-01	10.5500
1915-03-01	10.2800
1915-04-01	12.0700
1915-05-01	12.1700
1915-06-01	12.0700
1915-07-01	11.9700
1915-08-01	11.9700
1915-09-01	12.9300
1915-10-01	12.9300
1915-11-01	12.7100
1915-12-01	12.2000
1916-01-01	11.8100
1916-02-01	11.7200
1916-03-01	11.3600
1916-04-01	11.5400
1916-05-01	12.1000
1916-06-01	11.9000
1916-07-01	11.4500
1916-08-01	11.2800
1916-09-01	10.9500
1916-10-01	11.0300
1916-11-01	10.8700
1916-12-01	11.0300
1917-01-01	12.3200
1917-02-01	13.2100
1917-03-01	12.2300
1917-04-01	11.0400
1917-05-01	12.1800
1917-06-01	11.2400
1917-07-01	11.1800
1917-08-01	11.1800
1917-09-01	11.0500
1917-10-01	14.4800
1917-11-01	15.2700
1917-12-01	18.6700
1918-01-01	20.3200
1918-02-01	20.0000
1918-03-01	20.3200
1918-04-01	20.6600
1918-05-01	20.6600
1918-06-01	20.3900
1918-07-01	18.2600
1918-08-01	17.3800
1918-09-01	17.6800
1918-10-01	17.6800
1918-11-01	15.6800
1918-12-01	14.0900
1919-01-01	21.6400
1919-02-01	19.4500
1919-03-01	17.0200
1919-04-01	14.0700
1919-05-01	20.6200
1919-06-01	20.7200
1919-07-01	19.2800
1919-08-01	15.4500
1919-09-01	12.0800
1919-10-01	12.4700
1919-11-01	8.74000
1919-12-01	7.96000