1901,4.3,5,4.4,4.3,3.9,2.8,2.1,2.9,3.2,3.4,3.5,3.9
1902,4.1,4.4,4.5,4.3,3.9,2.6,2.7,2.5,3.2,3.4,3.9,4.3
1903,4.5,5.6,4.6,3.8,3.2,2.4,2.1,2.1,3,3,3.1,3.1
1904,3.5,4,3.8,3.7,3,2.8,1.8,2.5,2.8,3,3.8,3.9
1905,4.1,5,4,4.1,3.6,3.2,2.4,2.5,2.8,3.5,3.8,3.7
1906,4.2,4.8,4.4,4.4,3.5,2.3,2.1,2.3,3.1,2.8,3.8,3.3
1907,3.8,3.9,4.6,3.7,3.5,2.7,1.9,2.3,3,3.1,3.7,4.1
1908,4.3,4.4,4.5,4.2,3.7,3,1.9,2,2.6,2.6,3.3,3.7
1909,3.8,4.1,4.4,3.6,3.7,1.9,1.8,1.9,3,3.1,3.3,3.5
1910,4.1,4.6,4.4,3.5,2.4,1.3,1,1.3,1.6,2.2,3.2,3.1
1911,3.9,4.6,3.4,3.5,2.6,2.4,2,2.4,2.5,3.4,4.2,5
1912,5.8,6.2,6.1,5.5,3.3,1.9,1.3,1.7,2.9,3.5,3,4.2
1913,5,4.7,5,4.2,3,2,2.3,2.7,3.1,4.6,5.2,4.8
1914,5.3,5.8,5.1,4.3,3.1,2.1,1.9,2.7,2.9,3.5,3.8,5.1
1915,5.8,6.7,5.8,5.6,4,2.4,2.4,2.7,2.4,2.9,3.2,4.5
1916,4.6,5.2,4.9,5,3.3,0.8,0.2,0.9,2.8,2.5,2.2,4.3
1917,4.7,5.3,5.4,5,3.8,3.1,1.6,1.9,2.2,2.6,3.9,3.1
1918,4.4,4.5,4.7,4.1,1.1,4.8,3.6,4.7,3.3,3.3,3.9,4.7
1919,5.5,6.1,5.1,5,4.4,2,1.4,2,2.8,3.3,3.7,3.8
1920,4.5,4.8,4.8,4.1,2.4,1.4,0.7,1.6,2.3,3.2,3.4,3.2
1921,3.7,4.1,4.2,3.5,3.3,0,-0.2,1.4,1.6,2.3,3.7,3.8
1922,4.6,5.1,4.8,4.9,3.9,2.7,2.7,2.2,3.3,3.4,4.2,3.9
1923,4.1,4.7,4.7,4,3.9,3.1,2.7,2.9,3.7,3.3,4.4,4.3
1924,5.3,4.9,4.8,4.6,3.8,2.9,2.2,2.5,3,3.4,3.6,4
1925,4.1,4,4.1,4.3,4.2,3.2,2.1,3.5,3,4,4.3,4.8
1926,5.4,5.5,4.8,4.5,3.9,3.2,2.3,2.9,3.8,4.7,5.2,5.3
1927,5.3,5.4,5.3,4.5,3.8,2.9,2.3,2.9,3.9,4.8,5.2,5.5
1928,5.4,5.8,4.8,4.5,4.3,3,2.3,2.9,3.7,4.2,5.3,5.3
1929,5.5,5.5,5.3,4.5,3.9,3.1,2.3,2.7,3.5,4.2,4.9,5.3
1930,5,5.2,4.8,4.5,3.6,3,2.3,2.5,3.1,4.4,4.9,5.6
1931,4.5,4.5,4.8,4.7,3.5,2.7,2.2,2.7,3.5,4.6,5.3,5.1
1932,5,5.1,4.9,4.6,4.1,3.2,2.8,3,3.5,4,4.1,4.4
1933,4.3,5.2,4.8,4.5,3.7,2.8,2.2,2.5,3.4,4,4.1,4.4
1934,4.7,4.6,4.8,4.5,3.9,3.1,2.3,2.4,3.2,4.4,4.7,5.2
1935,5,5.3,5.2,4.4,3.2,2.9,2.3,2.5,3.6,3.8,4.5,4.7
1936,4.6,5.5,4.8,4.5,3.9,2.7,2.3,2.6,3.5,4.3,4.6,4.8
1937,5,5,5.3,5.4,4.4,4,3.6,4,4.3,4.5,5.5,5.4
1938,5.5,5.5,5.4,5.5,4.5,3.5,3.2,3.7,4.4,4.2,5.2,5.2
1939,5.1,5.4,5.5,6.1,4.7,4.4,3.6,2.8,3.9,5,4.8,4.9
1940,5.3,6.4,5.9,5.4,5,4.1,3.6,3.4,4.7,5.4,5.9,5.1
1941,5.9,6.1,6.5,5.6,5.5,3.5,3.4,4,4.9,5.8,6.6,6.3
1942,6.4,7.2,6.3,6.1,5.3,4.9,4.2,5,4.8,6,6.5,4.5
1943,7,6.8,6.9,6.6,5,4.6,4.4,4.2,5.2,5.9,6.5,6.3
1944,6.6,6,5.7,5.9,5.5,4.1,4,4.7,5.5,5.7,5.9,6.4
1945,6.4,6.2,5.3,6.5,5.7,3.1,3.4,4.6,5.1,5.6,6.3,5.2
1946,6.5,7.1,6.4,4.8,4.1,3,2,2.6,3.7,4.4,5.1,4.7
1947,6.2,6.5,6.3,6,5.3,2.8,2.1,2.4,3.2,3.7,4.2,3.3
1948,4.7,5.2,4.5,4.4,4.5,3,1.9,2.4,2.6,4,4.3,3.8
1949,6,4.8,5.2,4.3,2.8,2,1.2,1.6,2.3,2.7,3.9,3.8
1950,3.7,3.6,3.5,3.4,2.3,1.1,1.3,1.7,2.6,3.6,3.9,4.2
1951,4.5,2.9,3.5,3.6,3.9,3.6,3.4,3.3,3.6,4.4,4.5,4
1952,5.1,5.1,4.9,3.6,3.2,1.7,1.3,2,3.1,3.9,3.8,4.1
1953,4.6,4.8,5.1,5,3.7,2.6,2.1,2.7,4.3,3.9,4.4,4
1954,4.2,4.4,3.8,3.4,2.1,1.5,0.7,1.7,2.6,2.7,3.7,3.9
1955,4.6,4.5,4,3.1,3,1.9,1,1.5,2.3,3.1,3.6,3.9
1956,3.4,3.6,3.6,2.8,2.4,1.4,1.2,1.8,2.5,2.9,3.3,3.5
1957,3.7,4.9,5.3,5.1,5.1,4.2,3.3,3,3.5,4.2,5.1,5.4
1958,5.8,5.8,4.9,4.8,3.5,2.7,2.7,2.5,3.3,3.7,2.4,3.6
1959,3.6,4.4,4.6,4.5,3.8,3.1,2.3,2.1,2.9,3.7,4.4,4.5
1960,4.9,5,4.4,3.5,3.1,2.7,2.5,2.9,2.8,3.7,3.8,4.6
1961,5.4,4.9,4.7,4,4,2.6,1.9,2.7,3.4,4,4.4,4.1
1962,4.1,4.4,3.6,4.6,3.7,2.3,2.9,2.8,3.6,3.9,4.6,4.2
1963,4.2,4.2,4.3,4.3,4.1,2.6,3.1,3.7,3.6,4.2,4.6,4.6
1964,4.4,4.2,3.5,3.4,1.2,0.1,0.4,2.3,2.7,3.7,4.3,4.5
1965,4.1,3.5,4,4.1,3.2,2.1,1.2,3.7,3.6,4.5,4.9,4.9
1966,4.3,4.2,3.8,3.6,2.1,1.5,0.3,2.3,2.9,3.9,4.4,4.2
1967,3.6,3.4,2.9,3.4,2.4,1.1,0.3,1.8,2.8,3,3.7,3.4
1968,4.7,4.6,3.8,3.6,4.8,2.4,3,2.5,3.3,3.9,3.8,4.6
1969,5.4,5.6,5.6,5.5,5.7,4.4,2.6,2.5,3.8,4.7,5.1,4.7
1970,4.3,5.1,5.2,4.7,3.8,3.2,2,1.9,2.8,3.7,4.2,3.2
1971,3.2,4.3,3.7,3.9,3.6,2.8,2.3,2.1,3,3.6,4.3,4
1972,4.3,5.3,4.7,4.3,4.4,3.4,3.8,4,4.2,4.8,5.3,5.8
1973,5.5,5.8,5.1,4.5,4.2,3.8,2.2,2.1,2.5,3.4,3.6,3.5
1974,3.5,4,3.8,3.6,3.3,2.3,2,2,3,3.4,4.2,3.7
1975,3.3,5.5,3.3,4.3,3.1,2.7,2.8,1.8,2.5,3.3,3.5,4
1976,4.5,4.1,4.2,4.1,4,3.6,2.8,3.5,3.5,4.1,5.1,6
1977,5.6,5.3,5.9,5.8,4.7,3.8,3.3,3,3.9,3.8,5,4.5
1978,4.6,5.6,5.4,5.3,5,3.6,3.9,2.5,3.3,4.5,5.4,4.8
1979,6,5.6,5.7,5.4,5.4,4.5,3.1,3.4,4.3,4.7,5.1,5.1
1980,6,5.9,6.2,6,5,4.7,3.4,3.3,3.5,4.3,4.7,4.9
1981,5.4,4.8,5.6,5.1,4.7,3.4,3.1,2.9,3.2,3.5,4.2,4.7
1982,5.1,4.6,4.8,4.9,4.3,4.1,3.2,3.5,4.1,4.9,4.4,6.2
1983,7,7.3,7.1,6.7,4.3,6,5,4.7,4.5,4.5,5.1,5.4
1984,5.1,4.2,4.8,4.7,2.2,1.9,2.4,2.5,3.6,5,4.6,5.1
1985,5.1,4.6,5.5,4.4,2.9,0.6,1.2,2.3,3.1,4.2,4.3,4.6
1986,4.9,4.6,4.3,4.2,2,1.9,1.7,3.1,3.3,3.9,4.6,5.5
1987,6,5.3,7.1,6.2,3.9,3.2,1.8,3.5,4.5,5.3,5.3,5.3
1988,4.6,5.4,4.1,4,2.8,1.4,1.4,2.3,3.2,3.9,4.5,4.7
1989,3.7,5.4,4.7,2.5,2.5,0.7,0.9,2.6,3.3,4.2,4.2,4.6
1990,3.8,4.6,4.2,2.9,3.5,2,1.3,2.1,3.5,4,4.4,4.9
1991,4,5.4,5.7,4.8,4.1,3.4,2.5,2.8,3.7,4.6,4.9,5.2
1992,6.4,6.5,7.2,6.7,5.8,3.7,2.5,3,3.1,3.8,4.6,4.5
1993,5,6,5.8,5.1,4.9,4.2,3.3,3.3,3.8,4.3,4.5,4.6
1994,5.1,5.2,4.9,5,4.4,3.1,2.5,2.8,4,5,5.1,5.4
1995,6,5.9,5.2,4.7,4.2,3.3,3.2,3.3,4,4.2,3.7,4.3
1996,5.2,5.1,4.6,4.7,4.2,2.9,2.1,2.6,3.3,3.8,4.1,4.4
1997,5.1,4.9,6.1,5.2,5.9,5.2,3.2,2.5,3.7,4.7,4.7,6.2
1998,6.2,6.5,7.5,7,5.5,4.5,4,3.7,3.9,4.3,4.8,4.8
1999,5,5.7,5.6,4.6,3.2,2.8,2.9,3.3,3.6,4.5,4.8,4.7
2000,5,4.8,4.2,4.9,4,2.9,2.6,3.2,3.7,4,4.4,4.7
2001,5.1,6,5.1,4.9,3.7,2.6,1.7,2.3,3.3,3.8,4.4,4.4
2002,4.5,5,5.8,5.2,4.1,2.7,1.9,2.5,3.3,4.3,4.5,4.8
2003,5.3,5.7,5.9,3.9,3.3,2.3,2.5,1.7,3.4,4.3,5.2,5.1
2004,5.2,5.5,5.1,5.1,3.1,1.9,2.1,2.5,4.1,4.8,5.1,5.4
2005,5.9,5.1,5.5,4.8,3.7,2.7,2.5,3,3.5,3.8,3.3,2.7
2006,5.2,4.8,6.3,4.3,3.2,3.6,3.4,3.6,3.7,4.1,5.1,4.9
2007,6.1,5.1,5.2,4.8,3.4,2,2.1,2.5,2.6,3.1,3.9,4
2008,5.2,5.3,5.6,4.4,2.9,2.9,3.3,3.7,4,4.3,5.1,5
2009,5.6,5.6,5.7,4.8,3.9,3.4,2.6,3.5,4.2,4.6,5.2,5
