1901,14.3,12.1,10.7,8,5.5,4.3,2.2,3.2,5.6,7.1,9.3,12.2
1902,13.1,11.6,10.8,8.8,5,2.9,0.8,2,3.6,6.3,8.1,11.6
1903,13,11.1,9.8,7.5,5.8,3.2,2.4,2.7,4.4,6.9,9,11.1
1904,13.8,11.6,10.4,8.2,5.2,3.5,3,3,4,6.1,9.1,11.1
1905,13.9,12,11.8,7.6,3.4,3.8,1.8,2.1,4.5,6.2,8.9,11.1
1906,13.5,12.6,11.3,8.3,5.8,1.5,1,2.6,4.4,7.2,9.4,11.4
1907,12.2,12,9.7,6.7,4.5,1.7,2.3,2.6,3.6,6.1,8.6,9.5
1908,12.4,12.1,10.5,6,4.8,3.5,2.1,2.1,3.3,7.1,8.2,10.4
1909,12.5,11,9.9,7,4,2,1.5,1.9,3.7,6.6,7.6,10.4
1910,11.9,11.3,9.8,6.8,4.6,1.3,2.4,2.5,4.7,7.5,9.3,12
1911,12,10.7,9.7,6.1,4.6,3.4,2.8,1.8,3.9,6.8,9.1,11.4
1912,13.7,11.1,10.2,7.6,3.3,2.9,2.8,2.4,4.6,7,7.9,10.9
1913,13.5,11.4,10.2,6.9,4,2.6,1.7,2.3,5.7,6.4,9.1,11.4
1914,12.7,12.7,10.7,7.1,5.2,2.1,2.9,2.5,3.7,6.5,7.2,11.3
1915,12.4,11.9,11.2,6.7,3.8,2.6,3.2,2.9,5.2,7.4,9.6,11.5
1916,13,12.3,9.9,7.7,5.7,2.5,2,3.2,4.5,7.1,9.3,11
1917,12.3,12.6,10.1,8,5.3,3.8,3.1,2.9,4.6,7.7,10.1,11.1
1918,12.2,12.9,10.2,7.5,4,3.3,1.4,2.7,3.6,7.1,7.8,12.5
1919,12.7,12.3,11.6,7,5.9,3.3,2.9,4,3.8,6.6,7.5,11.9
1920,12.9,12.4,10,8.3,5,3.3,1.7,4,4.8,5.6,9,11.3
1921,12.7,11.5,10.4,8,4.4,2.5,2.8,2.4,4.3,6.9,9.6,11.2
1922,12,11.8,9.7,7.5,5.8,2.4,3.2,3,4.9,6.5,9,12
1923,12.7,12,9.8,6.5,5.3,2.4,0.7,1.6,4.2,5.5,8.6,10.1
1924,12.8,11.4,10.2,7.9,5.2,3.7,2.7,3.5,4.8,8,8.9,11.5
1925,12.4,11.3,10.2,7,4.9,3.1,2.6,3.3,5.3,6.6,8.6,11.8
1926,12.6,12.7,9.5,6.9,5.5,3.5,1.3,3.3,4.1,5.9,8.7,11.6
1927,12.5,12.2,10.9,8.2,5,3.3,2.5,3.2,3.6,6.9,8.8,11.2
1928,11.8,11.2,9.7,7.2,5.3,2.1,2.1,4,5.6,7.7,9.1,10.5
1929,13,12.7,10.3,8.4,5.4,4,3.2,2.9,4.3,6.6,8.5,10.1
1930,12.5,12.5,9.7,8.2,5.1,4.5,1.4,2.4,5.4,6.2,10.1,10.8
1931,13.1,13.6,11.3,8.6,5.8,5.6,2.4,3.8,5.4,6.4,8.5,12
1932,13.4,13,11.2,8.4,6.3,4.9,4,3,5,7.9,9.1,11.3
1933,12.6,11.4,9.5,8.6,6.3,4.6,2.4,4.8,5.5,6.9,8.5,9.9
1934,12.8,11.1,10.2,8.6,6,3.1,3.6,4.7,5.7,7.1,9.9,11.7
1935,13.5,12,11.9,9.3,7.6,4.7,3.6,4.8,4.4,5.7,8.9,9.4
1936,12.2,13.6,11,8.9,5.1,3.3,4.6,3.7,4.8,6.6,11.1,9.1
1937,14.3,10.7,9.1,9.2,5.8,4.9,3.5,2.1,5.4,8.1,7.8,12.3
1938,10.5,12.1,9.1,8,6.2,3.8,2.8,3.2,5,6.7,8.6,11.2
1939,12.3,11.3,10.6,7.8,6.3,5.4,4.8,5.1,6,7,8.8,13.7
1940,12.8,13.4,10.1,7.7,6.3,5.4,4.7,4.1,6,7.5,9.2,10.1
1941,14.7,12.2,12.2,6.6,4.4,5.1,4.1,4.8,4.9,8.3,6.9,10.3
1942,13.3,11.8,9.6,8.4,5.5,3.6,2.5,3,5.4,7.4,10.2,12.9
1943,14.1,13.4,10.1,10,7.2,3.9,3.9,3.3,5.1,7.4,9.5,14.7
1944,14.1,13.8,12.6,10,6.1,4.6,3.4,1.7,5,5.7,9.6,12.8
1945,15.5,13.6,12.3,9.2,6.9,4.9,2.1,3.4,5.9,7.5,8.5,10.9
1946,12.1,10.6,10.8,9.9,5.9,5.8,4.3,4.6,5.3,7.9,7.4,10.9
1947,11,12.1,11,8.3,6.3,5.3,3.2,3.7,4.6,8.2,11.2,10.3
1948,12.9,12.7,9.9,8.4,6.3,5.1,2.5,2,5,7.6,10.1,10.9
1949,14.5,11.5,8.8,9.6,5.7,4.1,3.7,3.4,5.3,9.4,10.5,11.1
1950,14.3,13,11,8,4.9,4.6,3.5,2.7,3.9,6.7,8.6,10.6
1951,12.8,11.3,10.4,9.3,7.9,5.2,3.7,4.4,4.2,7.8,8.9,13.8
1952,14,14.4,10.9,10.3,6.7,3.6,4.5,3.8,6.9,8.7,11.1,14.2
1953,13.4,14.4,11.6,9.6,7.7,5.4,3.2,4.5,4.7,6.6,10.3,13.4
1954,13.4,13.2,13.2,9,6.1,5.2,3.4,4.4,4.8,7.5,10.7,12.6
1955,15,12.1,11,8.5,4.9,3.9,2.3,2.6,5.1,8.3,12,11.1
1956,11,12.7,10.2,8.3,4.5,3.4,4.3,4,4.8,8.7,12,14
1957,13.7,13.7,12.3,8,7.7,4.3,3.1,4.2,6.3,7.4,11.1,10.9
1958,13.3,12.3,11.8,8.1,4.6,4.2,5.6,2.7,4.8,9.3,9.2,12
1959,13.6,13.7,11,6.4,5.7,4.2,3.5,3.2,4.4,7.2,10.1,13
1960,15.8,14,11.8,8.6,5.8,4.4,1.8,3.6,5.3,7.1,10,12.1
1961,12,12,10.5,7.8,5.1,2.7,4.1,5.1,5.4,7.4,9.6,12
1962,13.4,13.3,12.1,7.4,6.1,4.8,1.9,4.7,5,8.5,11.1,13.1
1963,13,14.3,10.5,9.1,5.2,3.3,4.2,4.1,4.7,8.1,7.9,11.4
1964,13.5,11,9.5,8.1,5.5,3,2.8,3.9,4.3,8.5,9.8,11.7
1965,13.5,12.3,11.5,7.2,3.9,6.2,2.5,3,3.9,6.6,9.6,9.8
1966,12.8,10.4,10.6,8.8,6.5,4.4,2.9,3.1,4,5.6,10,10.2
1967,12.8,11.3,10.5,7.6,6.2,1.4,2.4,2.3,4.1,7.1,9.4,12.4
1968,13.9,12.2,9.7,8.2,6.8,4.2,4.5,3.7,5.7,6.1,10.2,10.6
1969,13.2,11.2,10,7.8,5.7,3.2,3.7,3,4.8,6,8.6,12.7
1970,13.2,12.5,10.5,8.5,5.7,3.3,3.8,2.5,6.1,7,9.2,10.1
1971,10.9,10.5,9.6,6.6,5.2,1.9,3.9,3.1,5.4,7.7,10.1,9.5
1972,13.2,12,9.1,7.8,5.5,3.4,2.3,3.3,4,5.9,9.6,12.5
1973,12.1,11.5,10.8,7.6,5.1,4.3,1.8,3.2,4.3,6.9,9.1,11.7
1974,11.7,12.1,10.5,7.5,4.9,3,2.7,3.4,4.1,7.7,10.2,11.5
1975,14.8,11.7,10.4,8.6,5.7,4.6,2.2,2.6,4.9,6.5,7.9,10
1976,11.3,12.2,8.9,7,6.2,2.4,1.8,3,5.1,6.8,9.5,11.6
1977,13,12.3,10.7,9.3,6.5,4.3,3.6,3.7,5.6,8,8.9,12.8
1978,12.4,13.1,10.8,8.3,6.9,3.1,5.4,2.3,5.8,6.7,9.8,12.3
1979,14.4,12.7,11,8.6,6.5,3.7,3.3,4.8,3.8,6.9,9.3,12.2
1980,14.2,13,11.8,6.2,5.6,3.7,2.8,4.2,5.5,7.4,8.7,12
1981,12.7,12.4,11.2,9.3,6.1,4.7,3.1,3.6,4.2,7.7,8.7,11.6
1982,14.2,11.4,10.3,9,7.2,2.2,3.1,3.9,6.4,6.7,8.6,12.7
1983,14.7,12.4,10.6,8.2,5.3,2.2,1.5,3.3,3.6,7.9,10.6,14
1984,13.7,11.4,10.9,6.8,4.2,0.9,1.4,2.8,6,6.5,9.3,12.1
1985,13.5,12.4,10.2,6.8,5.4,6.4,3.5,3.8,5.2,7.1,11.3,12.3
1986,12.7,12.3,9.7,8,5.8,3.5,3.6,3.2,5.1,9.1,8.2,11.8
1987,13.9,13.3,11.7,8.1,4.5,4.8,4.5,3,4.9,8.3,10.8,11.5
1988,12.5,14.1,10.8,8,4.5,3.2,0.8,3.1,4.9,6.2,9.9,11.5
1989,13.7,13.3,10,8,4.2,5.2,3,3.5,4.8,7.9,10.3,11.9
1990,12.9,13.8,10.4,6.9,5.3,3.9,3.3,4.5,5.2,7.5,9,11.7
1991,13.1,12.7,10.6,7.7,5.5,3.6,2.3,2.4,5.3,6,10.1,9.8
1992,14,11.4,12,7.3,4,2.6,0.9,3.9,5,6.4,10.3,11.1
1993,12.3,13.1,11.8,8.7,4.7,4.3,1.9,4,5.2,7.6,9.1,11.2
1994,12.7,11.6,11.5,7.5,6.7,5.7,3.1,3.1,5.2,7.5,9.5,12
1995,11.8,12,10.1,8.6,5.7,4,0.8,1.6,4.7,7.3,9.4,14.5
1996,12,12.3,11.5,6.9,5.6,1.5,3.8,4.5,6,7.7,9.5,11.8
1997,13.5,10.7,11.8,9.4,6.5,5,3.9,3.8,5.3,6.8,9.1,11.7
1998,12.6,14,10.7,8.3,7.6,4.9,3.9,3.8,4,8,9.3,12.4
1999,14.4,13.1,10.3,7.5,5,2.1,2,4.4,5.7,8.7,10.5,11.9
2000,13,11.6,9.2,8,5.7,4.3,2,3.8,3.9,7.9,8.4,11.3
2001,12.3,12.7,9.8,6.8,5.4,4,2.5,3.9,5.2,8.4,8.6,13.4
2002,14.1,13.3,9.6,7.4,5.9,2,3.7,4.5,5.2,6.8,8.7,11.6
2003,13,11.6,11.7,7.3,5.6,5.1,2.5,3.6,5.3,7.6,9.7,9.8
2004,14.5,13.9,11.6,8,4.5,5.2,3.3,4,4.9,7.8,9.9,11.8
2005,12.4,14.9,10.5,7,4.8,3.2,3.2,2.7,4.8,7,10,11.8
2006,12.8,13.7,10,8.1,4.8,5.2,3.6,3.2,4.9,7,9,11
2007,13.5,11.9,11,7.4,3.7,2.5,1.8,0.7,5,6.9,8.8,11.7
2008,14.5,15.2,11.7,7.7,4.7,4.4,3.9,3.2,4.4,7.6,10.8,14.3
2009,14.1,12.7,11.6,8.9,5.4,3.4,2.1,4.7,4.1,6.4,6.8,10.7
