Month Percent 1875-03-01 23.2000 1875-05-01 22.9000 1875-06-01 25.5000 1875-10-01 22.4000 1875-12-01 21.6000 1876-03-01 24.3000 1876-05-01 23.1000 1876-06-01 25.1000 1876-10-01 23.8000 1876-12-01 22.6000 1877-01-01 25.5000 1877-04-01 23.4000 1877-06-01 24.8000 1877-10-01 22.5000 1877-12-01 24.0000 1878-03-01 25.8000 1878-05-01 25.2000 1878-06-01 25.6000 1878-10-01 23.8000 1878-12-01 24.5000 1879-01-01 25.7000 1879-04-01 23.6000 1879-06-01 23.8000 1879-10-01 22.7000 1879-12-01 22.3000 1880-02-01 22.7000 1880-04-01 22.3000 1880-06-01 24.7000 1880-10-01 22.8000 1880-12-01 21.8000 1881-03-01 20.6000 1881-05-01 23.0000 1881-06-01 21.9000 1881-10-01 19.5000 1881-12-01 20.3000 1882-03-01 20.0000 1882-05-01 21.0000 1882-07-01 20.4000 1882-10-01 19.1000 1882-12-01 19.9000 1883-03-01 18.6000 1883-05-01 19.5000 1883-06-01 21.0000 1883-10-01 19.6000 1883-12-01 21.0000 1884-03-01 21.7000 1884-04-01 20.9000 1884-06-01 21.5000 1884-09-01 24.1000 1884-12-01 25.7000 1885-03-01 27.8000 1885-05-01 28.4000 1885-07-01 28.0000 1885-10-01 25.8000 1885-12-01 24.0000 1886-03-01 23.8000 1886-06-01 23.2000 1886-08-01 21.0000 1886-10-01 20.9000 1886-12-01 21.9000 1887-03-01 21.7000 1887-05-01 21.6000 1887-08-01 21.3000 1887-10-01 21.1000 1887-12-01 20.9000 1888-02-01 22.5000 1888-04-01 22.2000 1888-06-01 22.5000 1888-10-01 21.4000 1888-12-01 21.4000 1889-02-01 22.4000 1889-05-01 22.4000 1889-07-01 21.4000 1889-09-01 19.7000 1889-12-01 19.9000 1890-02-01 20.2000 1890-05-01 19.4000 1890-07-01 19.6000 1890-10-01 19.4000 1890-12-01 19.9000 1891-02-01 21.5000 1891-05-01 20.9000 1891-07-01 21.2000 1891-09-01 20.2000 1891-12-01 20.8000 1892-03-01 22.5000 1892-05-01 22.7000 1892-07-01 22.0000 1892-09-01 19.7000 1892-12-01 19.3000 1893-03-01 19.3000 1893-05-01 19.7000 1893-07-01 19.9000 1893-10-01 25.7000 1893-12-01 28.2000 1894-02-01 28.6000 1894-05-01 28.3000 1894-07-01 27.2000 1894-10-01 24.5000 1894-12-01 23.2000 1895-03-01 23.0000 1895-05-01 22.6000 1895-07-01 23.1000 1895-09-01 20.7000 1895-12-01 20.6000 1896-02-01 21.6000 1896-05-01 21.8000 1896-07-01 21.6000 1896-10-01 22.5000 1896-12-01 24.6000 1897-03-01 26.3000 1897-05-01 24.9000 1897-07-01 24.6000 1897-10-01 22.3000 1897-12-01 22.8000 1898-02-01 23.6000 1898-05-01 24.5000 1898-07-01 24.4000 1898-09-01 21.9000 1898-12-01 22.8000 1899-02-01 23.6000 1899-04-01 22.2000 1899-06-01 21.1000 1899-09-01 20.3000 1899-12-01 18.8000 1900-02-01 20.8000 1900-04-01 21.9000 1900-06-01 21.9000 1900-09-01 21.8000 1900-12-01 20.5000 1901-02-01 21.9000 1901-04-01 21.1000 1901-07-01 20.5000 1901-09-01 20.0000 1901-12-01 19.2000 1902-02-01 20.2000 1902-04-01 19.8000 1902-07-01 20.0000 1902-09-01 17.6000 1902-11-01 18.3000 1903-02-01 19.4000 1903-04-01 18.1000 1903-06-01 18.6000 1903-09-01 18.4000 1903-11-01 17.4000 1904-01-01 20.1000 1904-03-01 20.1000 1904-06-01 20.8000 1904-09-01 20.4000 1904-11-01 19.1000 1905-01-01 20.0000 1905-03-01 18.4000 1905-05-01 18.5000 1905-08-01 18.7000 1905-11-01 17.0000 1906-01-01 18.2000 1906-04-01 16.9000 1906-06-01 17.4000 1906-09-01 16.4000 1906-11-01 16.2000 1907-01-01 17.4000 1907-03-01 16.4000 1907-05-01 17.1000 1907-08-01 17.0000 1907-12-01 16.8000 1908-02-01 20.1000 1908-05-01 21.1000 1908-07-01 20.5000 1908-09-01 20.3000 1908-11-01 19.2000 1909-02-01 19.4000 1909-04-01 19.4000 1909-06-01 19.3000 1909-09-01 18.2000 1909-11-01 16.8000 1910-01-01 17.4000 1910-03-01 17.0000 1910-06-01 16.8000 1910-09-01 17.5000 1910-11-01 16.4000 1911-01-01 16.9000 1911-03-01 18.0000 1911-06-01 18.2000 1911-09-01 17.2000 1911-12-01 16.4000 1912-02-01 17.6000 1912-04-01 17.1000 1912-06-01 17.0000 1912-09-01 16.0000 1912-11-01 15.2000 1913-02-01 16.4000 1913-04-01 15.5000 1913-06-01 16.0000 1913-08-01 15.9000 1913-10-01 15.4000 1914-01-01 16.9000 1914-03-01 16.6000 1914-06-01 16.2000 1914-09-01 15.0000 1914-10-01 15.6000 1915-03-01 11.9000 1915-05-01 11.8000 1915-06-01 12.5000 1915-09-01 13.2000 1915-11-01 12.1000 1915-12-01 11.3000