Month Percent 1852-01-01 3.11000 1852-02-01 3.10000 1852-03-01 3.06000 1852-04-01 3.02000 1852-05-01 3.01000 1852-06-01 2.99000 1852-07-01 2.99000 1852-08-01 3.01000 1852-09-01 3.00000 1852-10-01 2.99000 1852-11-01 2.98000 1852-12-01 2.96000 1853-01-01 3.01000 1853-02-01 3.02000 1853-03-01 3.01000 1853-04-01 2.98000 1853-05-01 2.98000 1853-06-01 3.00000 1853-07-01 3.06000 1853-08-01 3.06000 1853-09-01 3.15000 1853-10-01 3.26000 1853-11-01 3.16000 1853-12-01 3.14000 1854-01-01 3.26000 1854-02-01 3.28000 1854-03-01 3.34000 1854-04-01 3.43000 1854-05-01 3.38000 1854-06-01 3.25000 1854-07-01 3.25000 1854-08-01 3.20000 1854-09-01 3.15000 1854-10-01 3.16000 1854-11-01 3.24000 1854-12-01 3.24000 1855-01-01 3.29000 1855-02-01 3.30000 1855-03-01 3.23000 1855-04-01 3.31000 1855-05-01 3.33000 1855-06-01 3.25000 1855-07-01 3.30000 1855-08-01 3.30000 1855-09-01 3.33000 1855-10-01 3.42000 1855-11-01 3.40000 1855-12-01 3.34000 1856-01-01 3.38000 1856-02-01 3.30000 1856-03-01 3.26000 1856-04-01 3.23000 1856-05-01 3.20000 1856-06-01 3.18000 1856-07-01 3.14000 1856-08-01 3.16000 1856-09-01 3.19000 1856-10-01 3.26000 1856-11-01 3.22000 1856-12-01 3.18000 1857-01-01 3.20000 1857-02-01 3.21000 1857-03-01 3.21000 1857-04-01 3.23000 1857-05-01 3.20000 1857-06-01 3.20000 1857-07-01 3.27000 1857-08-01 3.31000 1857-09-01 3.32000 1857-10-01 3.37000 1857-11-01 3.35000 1857-12-01 3.29000 1858-01-01 3.17000 1858-02-01 3.12000 1858-03-01 3.10000 1858-04-01 3.10000 1858-05-01 3.09000 1858-06-01 3.07000 1858-07-01 3.14000 1858-08-01 3.11000 1858-09-01 3.09000 1858-10-01 3.05000 1858-11-01 3.06000 1858-12-01 3.06000 1859-01-01 3.13000 1859-02-01 3.14000 1859-03-01 3.13000 1859-04-01 3.18000 1859-05-01 3.28000 1859-06-01 3.21000 1859-07-01 3.16000 1859-08-01 3.15000 1859-09-01 3.14000 1859-10-01 3.12000 1859-11-01 3.12000 1859-12-01 3.09000 1860-01-01 3.16000 1860-02-01 3.17000 1860-03-01 3.17000 1860-04-01 3.17000 1860-05-01 3.17000 1860-06-01 3.16000 1860-07-01 3.22000 1860-08-01 3.22000 1860-09-01 3.22000 1860-10-01 3.23000 1860-11-01 3.21000 1860-12-01 3.20000 1861-01-01 3.28000 1861-02-01 3.27000 1861-03-01 3.27000 1861-04-01 3.27000 1861-05-01 3.27000 1861-06-01 3.35000 1861-07-01 3.34000 1861-08-01 3.30000 1861-09-01 3.22000 1861-10-01 3.23000 1861-11-01 3.20000 1861-12-01 3.31000 1862-01-01 3.23000 1862-02-01 3.23000 1862-03-01 3.20000 1862-04-01 3.20000 1862-05-01 3.20000 1862-06-01 3.27000 1862-07-01 3.23000 1862-08-01 3.21000 1862-09-01 3.21000 1862-10-01 3.20000 1862-11-01 3.20000 1862-12-01 3.25000 1863-01-01 3.24000 1863-02-01 3.24000 1863-03-01 3.24000 1863-04-01 3.24000 1863-05-01 3.21000 1863-06-01 3.26000 1863-07-01 3.23000 1863-08-01 3.23000 1863-09-01 3.21000 1863-10-01 3.23000 1863-11-01 3.24000 1863-12-01 3.30000 1864-01-01 3.30000 1864-02-01 3.30000 1864-03-01 3.28000 1864-04-01 3.28000 1864-05-01 3.29000 1864-06-01 3.33000 1864-07-01 3.32000 1864-08-01 3.37000 1864-09-01 3.41000 1864-10-01 3.39000 1864-11-01 3.31000 1864-12-01 3.36000 1865-01-01 3.35000 1865-02-01 3.36000 1865-03-01 3.37000 1865-04-01 3.30000 1865-05-01 3.32000 1865-06-01 3.36000 1865-07-01 3.33000 1865-08-01 3.34000 1865-09-01 3.34000 1865-10-01 3.38000 1865-11-01 3.36000 1865-12-01 3.43000 1866-01-01 3.43000 1866-02-01 3.44000 1866-03-01 3.45000 1866-04-01 3.46000 1866-05-01 3.48000 1866-06-01 3.48000 1866-07-01 3.42000 1866-08-01 3.40000 1866-09-01 3.36000 1866-10-01 3.36000 1866-11-01 3.34000 1866-12-01 3.37000 1867-01-01 3.31000 1867-02-01 3.30000 1867-03-01 3.30000 1867-04-01 3.31000 1867-05-01 3.24000 1867-06-01 3.17000 1867-07-01 3.17000 1867-08-01 3.17000 1867-09-01 3.17000 1867-10-01 3.19000 1867-11-01 3.17000 1867-12-01 3.23000 1868-01-01 3.24000 1868-02-01 3.22000 1868-03-01 3.22000 1868-04-01 3.21000 1868-05-01 3.17000 1868-06-01 3.16000 1868-07-01 3.17000 1868-08-01 3.19000 1868-09-01 3.19000 1868-10-01 3.17000 1868-11-01 3.19000 1868-12-01 3.25000 1869-01-01 3.23000 1869-02-01 3.23000 1869-03-01 3.23000 1869-04-01 3.22000 1869-05-01 3.23000 1869-06-01 3.24000 1869-07-01 3.23000 1869-08-01 3.23000 1869-09-01 3.23000 1869-10-01 3.21000 1869-11-01 3.20000 1869-12-01 3.26000 1870-01-01 3.25000 1870-02-01 3.24000 1870-03-01 3.23000 1870-04-01 3.20000 1870-05-01 3.19000 1870-06-01 3.23000 1870-07-01 3.29000 1870-08-01 3.31000 1870-09-01 3.26000 1870-10-01 3.25000 1870-11-01 3.23000 1870-12-01 3.27000 1871-01-01 3.25000 1871-02-01 3.28000 1871-03-01 3.26000 1871-04-01 3.23000 1871-05-01 3.21000 1871-06-01 3.24000 1871-07-01 3.22000 1871-08-01 3.21000 1871-09-01 3.22000 1871-10-01 3.23000 1871-11-01 3.22000 1871-12-01 3.25000 1872-01-01 3.24000 1872-02-01 3.25000 1872-03-01 3.23000 1872-04-01 3.23000 1872-05-01 3.22000 1872-06-01 3.25000 1872-07-01 3.24000 1872-08-01 3.24000 1872-09-01 3.25000 1872-10-01 3.25000 1872-11-01 3.25000 1872-12-01 3.27000 1873-01-01 3.26000 1873-02-01 3.23000 1873-03-01 3.24000 1873-04-01 3.22000 1873-05-01 3.21000 1873-06-01 3.25000 1873-07-01 3.24000 1873-08-01 3.23000 1873-09-01 3.24000 1873-10-01 3.24000 1873-11-01 3.24000 1873-12-01 3.26000 1874-01-01 3.26000 1874-02-01 3.26000 1874-03-01 3.26000 1874-04-01 3.24000 1874-05-01 3.22000 1874-06-01 3.24000 1874-07-01 3.24000 1874-08-01 3.24000 1874-09-01 3.24000 1874-10-01 3.23000 1874-11-01 3.22000 1874-12-01 3.27000 1875-01-01 3.25000 1875-02-01 3.23000 1875-03-01 3.23000 1875-04-01 3.21000 1875-05-01 3.19000 1875-06-01 3.23000 1875-07-01 3.18000 1875-08-01 3.17000 1875-09-01 3.18000 1875-10-01 3.19000 1875-11-01 3.17000 1875-12-01 3.20000 1876-01-01 3.20000 1876-02-01 3.18000 1876-03-01 3.18000 1876-04-01 3.16000 1876-05-01 3.12000 1876-06-01 3.18000 1876-07-01 3.15000 1876-08-01 3.11000 1876-09-01 3.13000 1876-10-01 3.14000 1876-11-01 3.13000 1876-12-01 3.19000 1877-01-01 3.15000 1877-02-01 3.13000 1877-03-01 3.11000 1877-04-01 3.15000 1877-05-01 3.18000 1877-06-01 3.17000 1877-07-01 3.17000 1877-08-01 3.15000 1877-09-01 3.14000 1877-10-01 3.13000 1877-11-01 3.10000 1877-12-01 3.15000 1878-01-01 3.15000 1878-02-01 3.14000 1878-03-01 3.15000 1878-04-01 3.16000 1878-05-01 3.12000 1878-06-01 3.13000 1878-07-01 3.14000 1878-08-01 3.16000 1878-09-01 3.16000 1878-10-01 3.18000 1878-11-01 3.14000 1878-12-01 3.18000 1879-01-01 3.13000 1879-02-01 3.12000 1879-03-01 3.10000 1879-04-01 3.06000 1879-05-01 3.04000 1879-06-01 3.08000 1879-07-01 3.07000 1879-08-01 3.07000 1879-09-01 3.07000 1879-10-01 3.06000 1879-11-01 3.05000 1879-12-01 3.08000 1880-01-01 3.07000 1880-02-01 3.06000 1880-03-01 3.07000 1880-04-01 3.04000 1880-05-01 3.02000 1880-06-01 3.05000 1880-07-01 3.05000 1880-08-01 3.08000 1880-09-01 3.07000 1880-10-01 3.04000 1880-11-01 3.00000 1880-12-01 3.04000 1881-01-01 3.04000 1881-02-01 3.03000 1881-03-01 3.01000 1881-04-01 2.98000 1881-05-01 2.93000 1881-06-01 2.99000 1881-07-01 2.97000 1881-08-01 2.99000 1881-09-01 3.03000 1881-10-01 3.03000 1881-11-01 2.99000 1881-12-01 3.02000 1882-01-01 3.00000 1882-02-01 3.00000 1882-03-01 2.97000 1882-04-01 2.95000 1882-05-01 2.94000 1882-06-01 2.99000 1882-07-01 3.01000 1882-08-01 3.01000 1882-09-01 3.00000 1882-10-01 2.96000 1882-11-01 2.94000 1882-12-01 2.98000 1883-01-01 2.96000 1883-02-01 2.93000 1883-03-01 2.94000 1883-04-01 2.93000 1883-05-01 2.94000 1883-06-01 2.98000 1883-07-01 3.01000 1883-08-01 3.00000 1883-09-01 2.98000 1883-10-01 2.96000 1883-11-01 2.95000 1883-12-01 2.98000 1884-01-01 2.95000 1884-02-01 2.96000 1884-03-01 2.94000 1884-04-01 2.93000 1884-05-01 2.96000 1884-06-01 3.00000 1884-07-01 2.99000 1884-08-01 2.98000 1884-09-01 2.97000 1884-10-01 2.97000 1884-11-01 2.99000 1884-12-01 3.02000 1885-01-01 3.01000 1885-02-01 3.02000 1885-03-01 3.07000 1885-04-01 3.12000 1885-05-01 3.02000 1885-06-01 3.01000 1885-07-01 3.00000 1885-08-01 3.00000 1885-09-01 3.00000 1885-10-01 2.99000 1885-11-01 2.99000 1885-12-01 3.00000 1886-01-01 3.01000 1886-02-01 2.98000 1886-03-01 2.98000 1886-04-01 2.98000 1886-05-01 2.96000 1886-06-01 2.97000 1886-07-01 2.96000 1886-08-01 2.97000 1886-09-01 2.97000 1886-10-01 2.98000 1886-11-01 2.95000 1886-12-01 2.98000 1887-01-01 2.98000 1887-02-01 2.98000 1887-03-01 2.96000 1887-04-01 2.93000 1887-05-01 2.91000 1887-06-01 2.95000 1887-07-01 2.95000 1887-08-01 2.96000 1887-09-01 2.96000 1887-10-01 2.93000 1887-11-01 2.91000 1887-12-01 2.95000 1888-01-01 2.92000 1888-02-01 2.93000 1888-03-01 2.95000 1888-04-01 2.97000 1888-05-01 2.96000 1888-06-01 2.98000 1888-07-01 2.98000 1888-08-01 2.99000 1888-09-01 2.99000 1888-10-01 2.99000 1888-11-01 2.97000 1888-12-01 3.01000