1890,9.6,24.5
1891,12.9,33.7
1892,9.9,27.9
1893,8.7,27.5
1894,6.8,21.7
1895,12.5,31.9
1896,13.0,36.8
1897,10.1,29.9
1898,10.1,30.2
1899,10.1,32.0
1900,10.8,34.0
1901,7.8,19.4
1902,16.2,36.0
1903,14.1,30.2
1904,10.6,32.4
1905,10.0,36.4
1906,11.5,36.9
1907,13.6,31.5
1908,12.1,30.5
1909,12.0,32.3
1910,9.3,34.9
1911,7.7,30.1
1912,11.0,36.9
1913,6.9,26.8
1914,9.5,30.5
1915,16.5,33.3
1916,9.3,29.7
1917,9.4,35.0
1918,8.7,29.9
1919,9.5,35.2
1920,11.6,38.3
1921,12.1,35.2
1922,8.0,35.5
1923,10.7,36.7
1924,13.9,26.8
1925,11.3,38.0
1926,11.6,31.7
1927,10.4,32.6