1901,6.8,7.4,8.1,9.2,9.9,9.7,9.1,9.3,9.4,9.1,8.5,7.4
1902,6.7,7.4,8,9.2,9.7,9.6,9.2,9.3,9.3,9,8.5,7.4
1903,6.8,7.4,8,9.2,9.9,9.8,9.2,9.3,9.3,9.1,8.5,7.3
1904,6.7,7.3,7.9,9.1,9.8,9.6,9.1,9.2,9.3,9,8.5,7.4
1905,6.7,7.3,7.9,9.2,9.7,9.7,9.2,9.3,9.4,9,8.6,7.4
1906,6.7,7.3,8,9.1,9.8,9.6,9.1,9.3,9.4,9.1,8.6,7.2
1907,6.6,7.2,7.9,9.1,9.7,9.6,9.2,9.3,9.4,9.1,8.5,7.4
1908,6.8,7.3,8,9.1,9.8,9.7,9.2,9.3,9.4,9.1,8.5,7.3
1909,6.7,7.2,8.1,9.1,9.8,9.6,9.2,9.2,9.4,9.1,8.4,7.2
1910,6.6,7.2,7.9,9.1,9.7,9.6,9.1,9.3,9.5,9,8.5,7.4
1911,6.6,7.2,7.9,9.1,9.7,9.7,9.2,9.3,9.4,9.1,8.6,7.3
1912,6.8,7.4,8,9.1,9.8,9.6,9.2,9.3,9.4,9.1,8.5,7.4
1913,6.7,7.2,7.9,9,9.9,9.5,9.1,9.2,9.3,9.2,8.4,7.2
1914,6.7,7.2,8,9.1,9.7,9.6,9.1,9.2,9.4,9.1,8.5,7.4
1915,6.8,7.2,8.1,9.1,11,10.7,10.4,10.8,10.3,10.6,9.3,8.2
1916,7.1,7.4,8,10.1,10.8,10.4,9.9,9.3,10.1,9.2,8.5,7
1917,6.1,6.1,7.7,9.3,9.9,9.2,9.4,9.2,9.5,9.2,8.5,7.4
1918,6.6,7,6.7,8.7,8.7,8.9,9.3,9.9,9.6,9.6,8.4,7.4
1919,6.7,7.3,7.9,9.1,9.8,9.7,9.1,9.3,9.3,9,8.4,7.3
1920,6.7,7.3,8,9.2,9.8,9.6,9.1,9.2,9.3,9,8.5,7.3
1921,6.9,7.1,7,8.5,9.1,9.2,9.2,8.8,9.4,8.2,8.2,7.1
1922,6.6,6.8,7.1,9.1,9.3,8.7,8.6,9.1,9.2,8.6,7.7,6.7
1923,5.8,6.4,7.5,9.1,9.6,9.5,9.1,8.9,9.7,8.7,8.7,7.4
1924,6.9,7.7,9.3,9.9,10,8.9,8.4,9.8,8.9,8.7,8.3,6.8
1925,6,6.5,6.8,9,9.8,9.7,8.7,9,8.9,9.4,8.5,7.8
1926,7.1,8.1,8.6,10.5,10.9,10.1,9.2,9.2,9,9.3,8.5,7.1
1927,6.5,6.7,7.7,8.2,9,9,8,9.2,8.8,9.2,8.8,6.8
1928,6.5,7.3,7.8,9.4,9.9,9.4,9.2,9,9.3,9.3,8.3,7.2
1929,6.5,7.5,8.2,8.8,9.3,9.5,9.1,9.1,9.5,9.5,8.6,7.2
1930,6.4,7,8.2,9.1,9.6,9.3,9,9,9.2,8.8,8.9,7.7
1931,7.2,7.7,8.8,9.8,10.4,9.9,9,9.3,9.3,9.3,8.6,7.3
1932,6.7,7.2,7.8,9.8,9.5,9.6,8.8,9.3,9.4,8.8,8.7,7.4
1933,6.8,7.1,8.6,9.6,10,9.8,9.5,9.5,10,8.6,8.4,7.6
1934,6.7,6.8,7.5,10,10.2,10,9.4,9.5,10.9,9.2,9,7.7
1935,6.8,7.4,7.9,10,9.5,9.6,9.3,9.1,9.9,9.4,8.4,7.5
1936,7.3,7.8,8.7,10,10.1,9.7,9.7,10.4,10.1,9.4,9.2,7.4
1937,6.8,7.4,8.9,10.1,10,9.8,9.4,9.6,9.7,9.5,9.1,8.2
1938,6.9,7.5,7.2,8.7,9.3,9.5,9.1,8.8,9.6,9.3,8.3,7.2
1939,6.5,6.4,7.6,8.9,10.1,9.5,9.4,9.9,9.9,9.3,8.9,8.5
1940,7.5,8.8,9,10.2,10.9,10.2,10.1,10.2,10.2,9.7,8.8,7.9
1941,7.6,9,9.4,10.9,11.5,10.6,10.3,10.6,11.2,10.2,9.4,8.7
1942,5.4,5.6,7.3,8,9.7,9.7,9.7,10.2,10.4,9.7,7.5,7.9
1943,7,6.9,6.8,9.1,8.8,8.4,8.4,9.1,10.1,9.2,8.5,7.4
1944,6.7,6.6,7.9,9.9,9.4,9.4,9.3,9.3,9.5,9.4,8.5,7.1
1945,7.6,7.9,8.7,9.8,10.3,10.4,9.9,10.7,11.5,9.9,9.2,7.6
1946,7.3,7.2,8.3,9,9.9,10.1,9.9,10.1,10.5,9.1,8.5,7.8
1947,7,7.7,8.2,9.4,10.2,9.6,9.6,10.3,10.1,9.4,9,7.6
1948,6.9,7.6,8.4,9.4,10.3,10.4,9.8,10,10.3,9.4,8.9,7.6
1949,7.3,7.9,8,9.2,8.8,7.4,7.5,9,8.8,8.2,7,6.4
1950,5.9,5.8,6.2,8.5,8.8,9.2,8.5,8.9,9.1,8.7,8.3,7.6
1951,5.2,6,6.6,8.9,9.2,8.9,8.7,9,9.5,9.2,8.1,7.1
1952,5.9,6.7,7.7,9.1,9.6,9.3,7.4,7.9,8.2,8.2,6.6,6.1
1953,5.3,5.3,6.2,8.1,8.2,8.5,8.1,9,7.5,6.5,6.2,4.9
1954,4.8,5,6.4,7.4,8,8,7.6,8.5,8.2,6.4,5.8,4.8
1955,3.5,4.9,5.3,6.4,8.1,7.6,8.9,8.1,7.5,7.2,6,5.4
1956,5.7,6.3,7.3,8.6,7.7,7.7,7.1,7.1,7.4,7.2,6.3,5.2
1957,3.7,5.3,6,7.8,8.2,8.6,8,8.7,8.7,7.7,7.1,6.2
1958,6.5,6.2,7.7,11,10.5,10.3,9.6,10.5,10.3,9,7.7,6.7
1959,6,5.8,7.5,9.1,9,7.8,9,8.9,8.8,8.4,7,6.8
1960,5.2,6.2,6.7,8.5,10,8.6,7.9,8.8,9.2,8.6,7.9,6.5
1961,6.7,6.3,7.9,9.2,9.7,9.1,9,9.2,8.8,8.7,8.1,7
1962,6,6.6,8,9,9.8,9.1,9.3,9.1,9.6,9.5,8.7,7.5
1963,6.6,7.4,8.1,8.9,9.8,9.8,9.4,9.4,10.2,9.9,8.8,8
1964,7.2,8.3,8.8,9.8,10,9.7,9.4,9.7,9.9,9.1,8.4,6.9
1965,6.5,7.6,8.3,9.3,10.1,9.7,9.2,9,9.6,9.3,8.9,7.9
1966,7.6,7.1,8.2,9.2,9.9,10,9.8,9.4,9.7,9.4,9.1,7.9
1967,7.1,7.2,7.3,8.5,9.3,9.2,8.8,8.7,9.1,8.8,8.7,7.4
1968,6.2,7.4,7.5,8.8,8.8,9.1,9,8.8,9.3,8.8,8.2,7.1
1969,7.3,7.9,9.2,10.4,11.2,10.8,9.8,9.9,9.9,9.2,8.7,7.8
1970,7.2,8.3,8,9.6,9.7,9.5,9.3,9.5,9.2,9.5,8.5,7.8
1971,7,6.8,7.5,8.6,9.5,9.2,9.2,8.8,9.4,9.1,8.2,7.1
1972,7.2,7,7.7,8.9,10,10,9.7,9.5,10.1,9.4,8.9,7.8
1973,7.7,7.7,8.8,9.8,9.7,10.1,9.6,9.6,9.8,9.5,8.6,6.9
1974,6.4,6.9,7.2,8.8,9.2,10.1,8.9,9.5,9.3,8.9,8.5,6.3
1975,5.5,7.2,8.3,8.8,9.4,9.5,8.7,9.4,9.3,8.9,8.6,7.2
1976,5.9,6.6,7.4,9.2,9.5,9.6,9.2,9.3,9.6,9.7,8.5,7.4
1977,7,7.5,8.5,9.7,10.3,10,9.5,9.5,9.7,9.5,9.1,7.3
1978,6.8,7.4,8.6,9.8,10.1,9.9,10.1,9.4,9.7,9.3,8.9,7.4
1979,6.4,7.6,8.4,9.7,10,10,9.7,9.8,9.4,10,9.2,8.1
1980,7.5,7.4,8.2,9.8,10.2,10.2,9.3,9.3,9.7,9.4,8.3,8.4
1981,7,8,8.4,9.5,9.8,9.6,9.3,9.8,9.5,9.6,9.1,8.3
1982,7.2,7.8,8.1,9.2,9.9,9.9,9.1,9,9.7,8.9,8.3,7.9
1983,7.6,7.8,9.4,10,10.2,9.9,9.6,9.7,9.4,8.8,8.1,7
1984,6.2,7.2,7.8,9.1,9.5,9.4,9,9.1,8.7,8.8,7.9,6.6
1985,5.9,6.2,7.6,8.9,9.2,9.2,8.8,8.8,9.1,8.8,8.1,6.4
1986,6.5,6.5,6.9,9.2,9.5,9.2,8.5,8.9,9,8.8,8.4,6.9
1987,6.7,8.4,8.9,9.9,9.9,10,10.2,9.6,10.1,9.8,9,7.6
1988,6.7,8,7.8,9.6,10.4,9.6,9,9,9,8.7,8.2,6.3
1989,5.9,5.8,7.1,9.4,10.1,10,10.2,9.8,10.4,10,9.4,8
1990,8.2,8.3,8.8,10.2,10.4,10.4,10.1,9.8,10,9.3,8.8,7.7
1991,6.9,7.6,8.5,9.2,9.6,9.9,10,10.2,10.3,9.5,9.4,8.1
1992,8,8.6,9.3,10.9,10.9,10.6,9.8,9.6,10,9.5,8.8,7.6
1993,7.5,7.6,8.3,9.6,9.8,10.5,10.2,9.9,9.8,9.7,9.2,7.8
1994,7.3,7.8,8.7,9.6,10,9.7,9.8,9.9,10.5,9.8,9.3,8.3
1995,7.3,7.5,8.7,10.1,10.3,10.2,10.1,9.7,9.7,9.3,8.6,8.1
1996,6.9,8,8.2,9.2,9.7,10,9.7,9.9,10.1,9.4,9.1,8.1
1997,7.3,7.9,7.8,9.7,10.2,10.4,10.1,10.3,10.6,10.4,9.5,8.7
1998,8.7,9.6,10.1,10.5,11.1,10.8,10.1,10.4,10.2,9.9,9.3,7.7
1999,7.6,7.9,8.2,9.3,10.1,10.1,9.4,9.5,9.7,9.1,8.9,7.9
2000,6.8,7.2,7.7,9,10,9.8,9.3,9.5,9.7,9.6,8.6,7.7
2001,6.5,7,8.3,9.4,10,9.7,9.8,11.3,9.8,9.8,9,8.8
2002,7.2,7.7,8.3,9.6,10.6,9.8,10.1,9.7,10.4,11,11.4,7.7
2003,7.6,8.4,8.9,9.7,10.1,9.8,9.8,10.2,9.9,9.6,9,8.2
2004,7.2,7.4,9.7,10,10.2,9.9,9.5,9.5,10.8,9.5,8.7,8
2005,7.9,7.7,8.8,10.2,10.2,10.4,10.1,10.1,10.2,9.2,8.8,7.4
2006,6.9,7.6,9.2,9.6,11.5,10,9.9,9.9,9.9,10.1,9,8.2
2007,9.9,7.2,8.7,9.3,10.6,10.1,10.2,9.9,9.5,9.3,8.8,9.2
2008,7.1,7.4,7.9,9.5,9.5,10,9.5,9.8,9.9,9.8,10,7.2
2009,7.1,7,8.5,9.6,9.7,9.8,9.7,10.1,10.9,9.7,10.4,9.1
