1901,3.7,5,7.9,11.7,14.5,17.5,18,17.8,16,13.1,8.2,5.4
1902,4.5,5,8.3,10.2,14.5,16,17.5,17,15.7,12,8.1,5.1
1903,3.5,4.9,7.5,11.5,13.8,16.5,18.1,16.8,16.3,13.6,9,5.8
1904,3.7,5.1,7.6,10.5,13.8,17.1,17.6,17.2,16.1,13.2,8,5
1905,3.4,3.4,6.4,9.9,14.4,17.4,17.7,16.3,16.6,12.9,8.7,5.3
1906,4.2,4.5,6.9,10.2,14.2,17,18.1,16.1,16.9,13,9,5.6
1907,4.6,4.9,6.6,10.4,14.1,16.5,16.9,17.8,15.2,13.2,9,5.8
1908,4.2,5.5,8.6,12.6,14.3,17.4,17.3,17.6,15.8,12.8,8.3,5.1
1909,3.7,5.2,9.2,11.1,13.4,16.5,17.8,16.9,16.9,13.9,10,6.3
1910,4.2,5.2,7.7,11.5,14.8,16.2,16.7,17.1,16.4,12.7,9,5.9
1911,5.1,4.6,7.3,11.5,14,17,17.1,17,15.9,12.7,8.4,5.1
1912,4.3,5.2,7.3,10.2,14.5,17,17,17,16,12.3,8.8,5.8
1913,4.2,5.1,7,10.2,12.8,16.7,17.5,17.3,15.9,12.7,7.9,5.1
1914,4.1,4.8,7.9,10.6,14.3,17.5,18,16.3,15.8,11.6,8.5,6.2
1915,5.2,5.8,8.1,11.9,14,16.1,16.8,16.5,15.5,14.9,10.3,6.5
1916,4.3,5.2,8.6,11,14.1,17.3,16.4,17.2,16.4,12.3,9.5,5.5
1917,3.5,4.7,7.5,10.3,15,16.6,17.5,17.4,15.8,13.2,9.4,6.2
1918,3.8,5,7.5,11.4,15.5,15.6,17.1,16.7,16.2,13.1,8.9,5.8
1919,4.6,5.2,9.4,11.6,14.9,16.9,17.4,18.6,15.1,12.2,9.5,6.3
1920,5.2,4.6,6.4,10.8,13.8,16.7,18,17,15.8,13.1,9.5,7.2
1921,5.2,5.1,8.1,11.3,14.1,15.8,17.1,16.8,15.8,11.8,8.8,6.2
1922,4.8,6.3,8.3,11.8,14.7,16.3,17,16.7,16.2,12.8,9,5.9
1923,5.3,4.6,9.4,12,13.4,16.8,17.3,18.2,15.6,12.5,9.4,6.5
1924,4.9,5.6,10.2,11.9,13.6,17.1,16.7,16.2,15.4,13.8,9.2,7
1925,4.1,4.6,8,11.3,12,17.1,17.3,16.3,14.5,12.5,9.1,5
1926,4.6,5.8,7,11.2,14.3,16.3,16.7,17.1,16.4,13.3,8.6,6.1
1927,4.2,4.1,6.1,10.1,13.9,16,18,16.9,15,13,9.1,6.2
1928,4.7,6.6,8.8,13.2,14.2,16.7,17.9,16.7,15.8,11.8,7.9,5.7
1929,3.6,5.1,9.1,11.7,12.7,15.9,17.7,17,15.6,12.3,8.6,4.7
1930,3.5,5.1,7.7,11,14.9,15.7,18.9,17,15.7,11.5,7.7,5.6
1931,4.7,4.9,8.4,11.5,13.6,16.5,17.4,18,15.7,14,8.7,5.7
1932,4.9,4.1,8.6,12.9,13.3,16.5,18.1,16.6,15.6,13.1,9.3,6.2
1933,3.9,5.6,9.2,11.4,13.6,17.1,17.9,17.4,16.7,13,8.3,6.1
1934,4.3,5.7,8.4,11.3,13.7,15.5,18,17.6,16.3,12.1,7.7,5.8
1935,4.4,5.4,9.2,11.8,14.7,16.8,18.6,17.5,16.2,14.4,9.8,4.8
1936,3.3,3.4,8.1,11.5,15.2,17.4,18.6,17.3,17,12.2,10,5.5
1937,4.1,5.1,8.5,12.7,14.6,17.9,19.1,17.2,16.8,13.5,8.1,6.8
1938,4.7,5.1,8.1,12.7,15.3,17.3,17.8,17.8,16.9,13.3,8.4,6.1
1939,5.1,5.9,8.5,11.7,15.1,17,18.1,18.5,16.2,13.5,9.3,6.5
1940,4.9,5.8,6.8,11.8,14.8,18.1,18.6,18.6,16.9,14.3,8.7,6.7
1941,3.9,5.9,9.5,12.6,14.9,17.7,19.5,18.2,17.2,13.7,9.1,7.6
1942,5.3,7.1,8.7,12.6,14.5,17.4,19.6,18.9,16.8,14.6,10.6,6.9
1943,4.8,5.9,6.8,9.9,14.6,17.5,18.6,18.2,17.4,13.6,12,6.9
1944,3,4.6,8.7,11.1,14.8,18.3,19.3,19.5,16.3,14.2,9.6,8.4
1945,5,3.6,9.1,13.1,14,18.3,18.6,17.8,17.3,12.2,9.7,5.6
1946,7.2,7.4,8,12.8,14.9,17.8,18.5,19.5,18.1,12.9,11,7.4
1947,4.8,6.2,9,11.6,14.2,18.3,20.1,18.6,19.5,13,10.1,8.2
1948,4.5,4.2,7.3,13.2,13.1,17.6,17.9,18.3,17.3,12.4,9.6,5.5
1949,4.9,5.9,7.8,10,14.5,17.4,17.7,17.5,16.5,13.6,8.5,4.9
1950,5,5.1,7.9,11.6,14.7,16.7,18.2,17.2,16.4,12.7,8.8,6.3
1951,5,6.3,9.3,10.4,13.8,17.2,16.7,18.2,15.2,13.3,10.1,6.4
1952,6,7.4,7.7,13,14.6,17.8,18.7,17.8,16.2,14.7,11.8,7.2
1953,4.1,6.4,10.6,13,15.6,18.1,17.6,19.9,16.9,14.2,10.4,8.2
1954,5.7,7.6,10.2,12.7,14.6,17.2,17.2,16.8,17.3,13,10,5.7
1955,4.4,6,9,11.1,15,15.9,16.9,17.1,17,13.9,10,6.7
1956,4.5,6.6,8.3,13,15.1,17.3,18.5,17.8,17.3,13.4,9.2,5.2
1957,5.2,3.6,8.8,11,13.1,17,18.2,18,16.8,11.1,9.9,6.9
1958,5.2,3.9,9.4,13.4,13.1,18.9,19.6,16.7,17.6,14,12.6,8
1959,5.1,3.3,8.5,12.3,13.2,16.2,19.1,18.7,15.3,12.7,9.6,8.3
1960,4.1,6.9,8.9,12.8,15.9,16.6,17.2,17.5,15,12.2,8.2,6.8
1961,5,4.6,7,12.5,12.9,18.9,19.1,18.1,16.9,14.1,6.8,2.9
1962,3.4,4.3,7.2,11.8,12.9,16.3,18.6,15.6,15.7,13.3,10,5.8
1963,4.1,5.2,7.7,10.8,14.5,16.4,17.3,16.6,17.5,11.8,7.1,5.7
1964,3.9,5,8.3,11.9,14.2,16.6,17.5,17.5,16,15.3,9.7,6
1965,4.4,3.6,6.3,11.8,14.5,16.7,17.2,15.4,15.4,12.1,6.8,6.2
1966,4.5,7.5,10.1,11.3,15.7,15.6,19,17.3,15.4,11.3,9.6,6.5
1967,4.4,5.5,6.7,10.9,14.6,16,18.5,19.6,16.8,12.1,5.4,5.4
1968,3.1,3,7.9,10.8,14.5,16.2,16.6,18.2,17.3,11.4,8.9,6.4
1969,3.6,5.9,9.2,12.2,16,16.6,17.7,17.2,15.9,12.1,9.6,6.7
1970,3.5,4.5,7.8,11.6,14.2,16.9,17.3,17.8,16.9,13.1,8.1,6.8
1971,3.9,5,9.1,12.7,13.5,17.1,18.4,18.2,18.1,13.5,8,6.1
1972,5.9,6,9.2,10.6,15.2,18,19.4,19.1,15.4,12.8,8.5,6.6
1973,4.9,5.1,8.8,12.7,14.7,16.7,19.6,18.2,17.5,13.3,8.5,4.9
1974,4.3,6.7,8.1,12.2,14.8,17.3,16.3,16.8,15.1,15,9.9,4.1
1975,3.6,5,8.3,11.6,13.7,18.2,17.8,18.1,15.9,14.6,9,5.5
1976,4.2,5.5,7.9,11.7,14,16.2,18.4,17.5,16.4,12.5,9.8,6
1977,4.8,6.5,9.2,10.3,12.8,15.7,18.4,17.7,16.7,11.1,7.7,4.4
1978,2.6,4.7,7.3,11.7,14.6,17.1,17.8,18.3,15.6,13.3,7.6,7.2
1979,5.2,5,7.2,13.3,16.9,18,17.5,17.6,14.9,12.1,10.1,5.2
1980,3.1,5.6,7.8,12.2,14.7,17.8,18,16.6,16.2,11.1,10.1,7.8
1981,3.6,7,7.3,11.1,14.5,18,17.9,17.8,17,14.4,8.2,3.4
1982,5.6,3.9,7.9,10.7,14.8,16.3,17.8,19.1,16.6,12.7,7.8,4.5
1983,2.2,1.9,6.6,9.3,14.4,17.8,19.6,19.1,16.8,14.5,8.5,5.7
1984,3.7,6,9.6,11.6,13.9,18.5,17,18.6,15.5,14.9,9,7.1
1985,3.5,5,9.5,12,14.9,16.8,16,18.9,16,13.4,7.4,6.7
1986,5,5.1,7,9.8,14.8,19,18.5,18.2,15,11.3,9.2,5.3
1987,5.2,6.2,8,11.1,15,18.5,16.6,15.5,14.8,12.1,11,7
1988,5.4,7.3,8.5,11.6,14.7,17.9,18.2,17.1,15.5,14.2,8.8,7
1989,3.8,4.5,9.1,10.2,15.5,17.9,17.8,17.6,16.3,12.8,7.7,4.8
1990,7,4.5,6.7,9.9,14.4,16.8,17.7,18,15.3,11.8,10,6.9
1991,2,6.4,8.9,10.8,14.1,16.3,17.3,15.6,15.2,12.2,8,4.4
1992,4.1,2.7,8.1,11.7,13.5,16.9,17.3,17.2,17.5,12.1,8.3,4.1
1993,3.4,6.2,7.4,11.6,14.5,16.1,18.3,15.7,14.6,12.8,8.9,7
1994,6.3,4.3,7.1,10.7,14.8,17.6,19.1,17.9,18.2,12.3,8.1,5.4
1995,2.8,4.4,8.6,11.5,16.1,17.2,16.8,17.4,15.3,13.4,9.2,5.3
1996,5.2,6,8.7,12.3,14,17.2,17.3,17.9,15.7,13.6,8.3,7.8
1997,3.7,4,7.6,9.2,14,15.6,18.4,18.8,14.9,11.8,8.1,5.4
1998,4.6,5.6,6.2,12.7,17.1,16.7,17.4,15.6,17.7,14.3,10.5,7.9
1999,6.3,9.7,10.8,14.5,14.9,17.8,17.5,15.7,16.8,13.2,10.4,6.9
2000,4.6,4.2,7.5,10.8,15.2,17.4,17.1,15.7,15,13.5,9.3,7.3
2001,5.3,7.1,8.5,11.1,14,16.4,18.9,16.7,16.8,12.9,10.2,7.1
2002,4.7,8.3,8.6,11.5,14.9,17.9,16.7,17.7,16.6,12.8,9.8,7.4
2003,6,6.2,8.3,12.5,13,16.1,17.5,17.7,16.4,13.7,10.2,6.8
2004,5.6,6.5,10.7,11.4,14.8,16,15.9,17.4,16.5,11.8,8.4,7.8
2005,4.7,5.3,7.8,11.1,13.4,17.5,18.8,17.6,18.4,13.3,9.5,7.6
2006,7.4,8.4,8.9,10.4,14.2,17.4,19.8,20.1,17.4,13.1,8.9,8
2007,6.4,5.5,10.3,12.1,16.3,17.4,19.3,18.9,16.2,15.4,9.7,7.8
2008,5.6,4.6,8.2,12.1,14.9,16.8,18.7,17,17.7,13.5,9.4,7.8
2009,6.1,7.8,9.4,14.3,16.6,19.6,19.1,18.5,18.5,16.3,11,6.8
