1901,3.7,1.6,3,5.9,8.4,10,12.7,11.3,10.7,7.7,4.1,2.5
1902,2.9,2.4,4,5,6,9.2,9.5,9.4,9,7.8,6.4,4
1903,3.5,4.3,4.2,4.1,7,8.9,10,10.4,9.8,7,4.5,3.7
1904,4.1,1.9,3.2,5.1,7.3,9.7,11.1,11.1,10.7,7.4,4.5,4
1905,3.6,3.2,4.6,3.4,6.9,10.3,11.7,11.3,9.5,5.1,4.5,4.9
1906,3.6,2.2,2.3,4.8,6.2,9.9,10.1,11,10.5,7.6,6.3,2.8
1907,3.7,2.8,3.7,4.6,6.7,8.7,9.8,9.2,8.6,7.6,5.1,3.7
1908,3.8,2.7,3.2,4.1,7,9.2,11.2,11,9.7,9.4,5.3,4.5
1909,3.4,3,2.3,5.1,6.4,8.7,10.3,10.4,9.1,6.8,3.7,2.1
1910,2.7,3.1,4.4,4.8,8.1,10.5,11.6,12.8,9.8,7.9,2.8,4
1911,3.8,3.7,3.7,4.9,8.7,10.2,11.7,12.5,10.3,6.5,4.2,5.6
1912,2.9,3.4,4.7,5.2,7.1,9.3,11.6,10.8,9.3,7.4,4,4.2
1913,3.7,3.7,3.4,5.5,7.8,9.7,11.2,11.3,10.3,8.3,6.7,3.6
1914,4.1,5,3.5,6.5,6.3,10,12.3,12.2,10,8.4,4.9,3.2
1915,3.4,3,2.1,4.9,5.9,8.8,10.8,11.4,9.6,8,3.5,0.8
1916,4.5,2.9,1.7,5.4,6.9,8.6,11,10.7,9.7,7.5,6.3,3.7
1917,2.4,3,2.1,3,7.1,10.6,11.6,13.3,10.2,6,4.7,1.9
1918,0.7,4.1,4.3,5,8.6,9.4,11.4,12.2,8,7.6,5.7,4.3
1919,4,1.4,1.4,4.4,8.8,10,10.9,10.7,9.6,6.3,2.2,3.2
1920,2.7,3.7,4.7,4.9,7.4,10.1,11.4,10.6,9.6,9.4,7.1,5.2
1921,4.1,4.8,3.9,6,7,8.8,10.2,9.8,9.4,8,4.8,4.2
1922,2.8,3.5,3.5,3.5,6.9,9.1,10.3,10.5,9,6.5,4.8,4.6
1923,3.7,3.2,4.9,4.5,5.7,7.7,11.3,10.9,9,7.3,3.7,2.7
1924,4.4,3,2.2,4.1,6.7,8.6,11.3,12.4,10.5,8.2,7,6.6
1925,5.5,3.3,2.8,5.1,8.1,9.9,12.8,11.4,9.2,6.5,4,1.8
1926,4.7,4.5,4.3,7.1,6.8,10.6,12.6,12.4,10,4.6,5.9,3.9
1927,3.2,4.2,5.4,3.4,5.6,7.8,12.3,12.2,9.5,6.6,4.1,2.2
1928,3.5,4,4.3,5.1,7,8.1,10.2,10.4,9.5,7.8,5.4,4
1929,3.8,2.6,6,4.5,7.8,8.9,11.2,11,10.1,6.5,5.7,4.9
1930,4.2,3.4,2.5,6.2,7.3,10.8,12.2,12.8,10.6,7.7,3.8,5.3
1931,2.6,2.2,1.7,5.4,7.9,8.6,11.5,10.8,9,6.8,7.7,4.9
1932,5.1,5.2,3.8,4.2,7.5,9.5,12.3,11.8,9,6.2,5.7,5.1
1933,4.4,2,5.2,5.1,7.7,12.1,13.6,13,11.4,8,5.9,5.5
1934,4.9,5.2,4,5.1,7.3,10.3,13,13,11.4,7.5,5.4,6.6
1935,4.4,2.8,5.3,5.1,7.1,9.7,11.5,12.3,10.5,7.2,6.5,3.3
1936,2,2.8,4.2,4.4,8.1,10.5,13.4,12.7,10.9,7.8,5.9,4.3
1937,3.9,2.3,1.7,6.2,8.5,9.9,11.9,12.1,10.2,8.9,5,3.4
1938,4.2,4,5.8,5.8,6.8,9.9,11.9,12.6,10.5,8.7,6.4,4.7
1939,2.5,5.2,5,5.2,8.1,10.2,11.6,12.9,11.2,7,5.5,3.6
1940,1.8,1.9,2.9,4.6,8.6,11.6,11.3,10.7,9.1,7.9,4.9,4
1941,1,1.9,3.1,4.5,6.6,10,12.8,11.7,10.9,7.8,5.7,4.9
1942,1.7,1.5,2,5.7,7.3,9.5,11.5,11.9,10.2,7.3,5.8,5.1
1943,3.4,4.5,5.7,6.1,8,10.4,11.9,10.9,10.5,9.5,5.3,5
1944,3.8,3.4,3.5,5.6,7.2,9.8,12.3,12.4,9.9,8,4.2,3.9
1945,0.8,4.5,6.3,6.1,8,10.5,12.5,12.4,11.3,9.3,7.1,4.5
1946,4.6,2.8,4.1,6.1,7.9,10.1,12.6,12.2,11.4,8.3,6.1,5
1947,3.4,-0.1,0.4,5.1,8.8,10.4,13.4,14.2,10.9,8.5,4.6,4.3
1948,2.2,4.2,5.8,6,7.3,9.7,11.2,10.7,9.8,6.6,5.9,6
1949,3.5,4.6,3.1,5.7,7.5,9.9,12,11.7,11.7,8.8,6.9,3.7
1950,4.7,2.7,5.1,5.1,7.8,10.5,12.4,13.1,10.3,8,4.6,1.4
1951,3.1,3,2.2,3.6,6.8,8.9,10.8,11.6,10.6,9,6.2,4.2
1952,1.3,2.6,4.1,6.4,7.9,8.8,11.2,11.1,8.1,7.3,3.6,3.7
1953,4.1,3.1,5.6,4.3,7.6,10.7,12.5,12.3,11.1,9.3,7,6
1954,3.4,2.7,4.1,5.4,8.4,10.5,11.2,11.5,9.2,6.9,5.6,4.1
1955,1.9,0.6,3,5.9,6.1,9.5,12.8,12.8,11.2,7,6.7,2.2
1956,1.6,2.3,3.8,4.3,8.2,9,11.2,10.4,10.5,7.5,6.3,4.7
1957,4.7,2.9,5.5,6.2,7,9.3,11.3,11.2,9.4,7.8,6,3.8
1958,2.3,1.2,1.8,4.9,6.3,9.8,11.8,11.7,11.9,9.3,7.1,3.6
1959,0.6,4.6,5.7,6.5,8.2,10.4,12.5,12.3,11.1,9.7,6.6,5
1960,2.8,2.6,4.9,6.2,8.9,11.2,12.2,12.2,11.1,8.1,5.8,4.1
1961,3.4,4.6,5.4,5.2,7.7,10,11.6,11.9,11.1,9.4,5.5,2.4
1962,3.9,3.2,1.3,4.8,6.9,9.9,10.6,11.1,9.8,8.5,4.5,3.6
1963,1,1.7,4.6,5.5,7.4,10.8,11.1,11.8,9.9,8.2,4.9,3.5
1964,5,4,4.6,6,8.4,9.9,11.1,10.1,8.9,7.8,5.7,2.8
1965,2.6,3.8,2.9,5.4,6.8,10.1,9.9,11.1,10.4,9.1,3,1.7
1966,2.3,1.7,3.8,4.3,7.5,11.1,11.4,11.3,10,7.9,4.3,3.2
1967,3.4,4.6,4.1,4.8,6.9,9.9,11.4,11.3,11.1,7.3,6,3.5
1968,2.1,1.4,3.6,5.1,5.9,10.2,11.4,11.4,10.8,8.1,5.3,3.7
1969,4,0.2,1.9,5.1,7.1,10.7,11.8,13.3,9.9,8.9,2.5,3.5
1970,2.6,1,2.4,4.2,8.1,11,10.7,12,10.1,7.3,4.4,4.4
1971,3.8,4.6,3.9,5.4,8.9,9.1,11.2,11.5,10.4,8.2,4.4,5.5
1972,3.8,4,4.9,5.8,8.2,9.7,11.6,11.1,9.3,8.6,5.1,5.8
1973,5.5,2.8,5.6,3.7,7.1,9.5,11.4,11.2,10.1,6.8,3.6,2.8
1974,5,4.3,4.7,6.6,8.1,10.3,11.4,12.1,10.1,6.8,5.8,4.3
1975,3.7,4.5,3.6,4.4,6.5,9,11.3,12.7,9.5,8.8,5.9,4.1
1976,2.4,4,3.3,5.1,8,10.7,12.5,12.6,9.2,8.9,6.2,2.2
1977,2.5,2.5,4.7,4,7.2,9,11.3,11.4,9.1,9,4.7,5.2
1978,2.5,1.4,4.3,4.2,8,10,10.4,11.2,9.7,8.1,5.5,3.3
1979,0.8,1.1,2.4,5,5.8,9.8,10.5,10.9,9.2,8.3,4.7,3.7
1980,2.6,3.4,3.1,5.8,7.5,11,11.8,11.8,10.9,6.3,4.4,3.8
1981,2,3.1,3.7,4.9,7.6,9.5,11.3,11.7,11.3,5.8,4.6,0.8
1982,2.5,4.6,4.6,5.7,7.7,9.9,12,11.9,9.6,8.6,5.7,3.5
1983,3.8,2.6,4.2,4.2,7.4,9.6,11.8,11.6,9.5,7.6,5.7,4.4
1984,1.5,4.1,3.1,5.6,7.4,10.3,11.9,12.5,10,8.4,6.4,5.7
1985,1.9,3.1,3.4,4.7,7.2,9.5,12,12.2,9.2,9,3.1,3
1986,2,1.9,4.5,4.3,8.3,10.2,11.4,11,8.7,7.8,5.8,3.9
1987,2.4,2.6,2.8,6.7,7,8.9,11.8,11.5,10.1,8.3,6,5.4
1988,3.7,3.5,3.1,4.4,7.9,10.4,12.3,11.9,10.7,8.2,5.5,5.6
1989,6,4,4.6,5.4,8,9.9,11.6,11.5,10.2,8,6.2,4.1
1990,4.8,4.6,4.9,5.3,8.1,10.5,11.9,12.5,9.8,8.6,5.8,4
1991,4.1,3,5.5,5.8,7.7,8.8,13.1,13,10.1,8.2,5.8,5
1992,5.2,4.7,4,5.5,8.8,11.7,11.7,11.6,10.2,6.4,5.2,4.2
1993,3.2,4.1,4.7,5.8,7.6,8.9,10.4,10.6,9.7,6.7,5.7,2.6
1994,2.6,2.8,3.1,5.1,6.7,9.2,12.5,11.9,9.6,7.1,7,4.4
1995,2.9,2.6,3,4.5,6.7,9.9,11.3,12.5,10.7,9,6,2.5
1996,4.9,2.4,3.7,6,6.2,10,11.1,12.8,10.9,8.9,3.2,3
1997,4.5,3.9,4.8,4.9,7.1,9.8,12.7,13.9,10.6,7.5,7.1,5.6
1998,4.4,5.1,4.1,5.2,8.3,9.3,11.3,11.2,11.2,7.2,5.3,4.7
1999,4,2.5,4.9,6,7.5,9.8,11.5,11.9,11.9,8.7,6.6,2.8
2000,4.3,4,4.4,4.9,8.5,9.1,11.1,11.8,11.2,9.2,6.8,4.7
2001,4.4,1.9,3,5.1,8.3,9.3,11.6,12.1,10.2,10.3,5.6,4
2002,5.1,3.5,4.5,6.7,8.8,12.2,12.4,13.8,11.8,7.3,6.6,5.1
2003,3.9,4.8,6.6,6.8,8.2,11.8,14.1,13.8,11.2,7.3,7.5,4.8
2004,4,3.9,5.9,7.3,8.7,10.5,11.8,13.5,11.2,8.8,5.8,5.4
2005,4.6,3.9,4.8,6.5,7.2,10.1,12.2,12,10.6,9.2,6.3,5.2
2006,5.6,4.6,2.4,5.1,7.8,10.6,13.7,13.2,12.5,9.5,7,6.5
2007,4.5,4.4,6,7.3,7.8,10.3,11.9,11.6,9.5,9,5.3,5.4
2008,4.2,5.3,3.8,6,9,10.5,13.1,13.2,11.9,7.7,5.6,4.9
2009,4.7,3.3,5.4,7.6,9,10.8,13.5,13.2,11.5,8.2,7.2,4
