1901,6.4,6.6,6.2,6.2,6.1,5.4,5,5.5,5.8,6.2,6,6.2
1902,6.3,6.1,6.2,6.1,6.1,5.3,5.3,5.3,5.8,6.1,6.3,6.4
1903,6.6,7,6.2,5.8,5.6,5.1,4.9,5,5.7,5.9,5.8,5.7
1904,5.9,5.9,5.8,5.8,5.5,5.4,4.8,5.2,5.5,5.9,6.2,6.2
1905,6.3,6.6,5.9,6.1,6,5.6,5.2,5.2,5.5,6.2,6.2,6.1
1906,6.4,6.5,6.2,6.2,5.9,5,4.9,5.1,5.7,5.7,6.2,5.8
1907,6.1,5.8,6.3,5.8,5.8,5.3,4.8,5.2,5.7,6,6.2,6.3
1908,6.5,6.2,6.2,6.1,6,5.6,4.8,5,5.4,5.6,5.9,6
1909,6.1,6,6.2,5.7,6,4.8,4.7,4.9,5.6,6,5.9,5.9
1910,6.7,6.6,6.6,5.2,4.7,3.6,3.7,3.9,4,4.9,5.4,5.3
1911,6.3,6.1,5.3,5.1,4.8,5.1,4.7,5.1,4.9,6,6.7,7.2
1912,7.9,8,7.9,7.5,5.4,4.2,4.1,4.3,5.5,6.4,5.7,6.6
1913,7.4,6.4,6.9,6.3,5.5,4.6,5.1,5.7,6,7.8,7.9,7.1
1914,7.7,7.3,6.7,6.3,5.1,4.3,4.6,5.4,5.5,6.5,6.4,7.4
1915,7.9,8.5,7.2,7.2,5.9,4.8,5.3,5.4,4.9,5.6,5.6,6.9
1916,6.9,7.4,6.9,7.4,5.7,3.3,3,3.7,5.5,5.3,5,7.1
1917,7.5,7.9,7.6,7.5,6.7,6.1,4.6,4.6,5,5.4,6.8,5.7
1918,6.8,6.1,6.6,6.3,2.9,7.8,6.6,7.7,5.9,5.9,5.9,6.3
1919,7.5,7.5,6.5,6.9,6.8,4.1,3.9,4.5,5.3,5.7,6.1,6
1920,6.7,6.6,6.6,5.7,4.7,3.7,2.9,4.2,4.8,6,5.8,5.1
1921,5.6,5.6,5.8,5,5.4,2.2,1.6,3.8,3.7,4.8,5.7,5.7
1922,6.7,6.6,6.4,6.6,6.1,5.4,5.4,5.1,5.8,6.1,6.5,6.2
1923,6.3,6.4,6.3,6,6.1,5.6,5.3,5.6,6.1,6.1,6.7,6.5
1924,7.1,6.5,6.4,6.3,6.1,5.5,5.1,5.2,5.6,6.2,6.1,6.2
1925,6.3,5.9,6,6.2,6.4,5.6,5,5.9,5.6,6.6,6.6,6.8
1926,7,6.7,6.4,6.3,6.1,5.6,5.1,5.5,6,6.8,7,6.9
1927,6.9,6.7,6.6,6.3,6,5.5,5.1,5.5,6.1,6.8,6.9,7
1928,7,6.8,6.4,6.3,6.2,5.5,5.1,5.5,6,6.6,7,6.9
1929,7,6.7,6.6,6.3,6.1,5.5,5.1,5.4,5.9,6.6,6.8,6.9
1930,6.8,6.6,6.4,6.3,6,5.5,5.1,5.3,5.8,6.7,6.8,7
1931,6.6,6.3,6.4,6.4,5.9,5.3,5,5.4,6,6.8,7,6.8
1932,6.8,6.6,6.5,6.4,6.3,5.7,5.3,5.6,6,6.6,6.5,6.6
1933,6.5,6.7,6.4,6.3,6,5.4,5,5.3,5.9,6.5,6.5,6.6
1934,6.7,6.4,6.4,6.3,6.1,5.5,5.1,5.3,5.8,6.7,6.8,6.9
1935,6.8,6.6,6.5,6.3,5.7,5.4,5.1,5.3,6,6.5,6.7,6.7
1936,6.6,6.7,6.4,6.3,6.1,5.4,5.1,5.4,6,6.7,6.7,6.8
1937,6.8,6.6,6.8,7,6.5,6.3,6.1,6.4,6.6,6.9,7.4,7.2
1938,7.3,6.9,6.8,7.1,6.6,5.9,5.8,6.1,6.7,6.7,7.2,7.1
1939,7,6.9,6.9,7.5,6.7,6.6,6.1,5.5,6.3,7.3,6.9,6.9
1940,7.1,7.6,7.2,7,6.9,6.3,6,5.9,6.9,7.6,7.7,7
1941,7.7,7.5,7.8,7.2,7.5,6,6,6.5,7.1,8,8.4,8
1942,8.1,8.4,7.6,7.6,7.3,7.1,6.7,7.3,7.1,8.1,8.4,6.6
1943,9.5,8,9.4,8.7,6.8,6.6,6.9,6.5,7.5,8.4,8.4,8.4
1944,8.8,7.6,7.2,8,8.1,7.2,7.4,7.3,8.5,8.2,8,8.4
1945,8.6,8.1,7.5,8,7.7,5.6,6.2,7.3,8,8.2,8.7,7.5
1946,8.2,8.4,8,6.9,6.5,5.9,5,5.7,6.5,7.3,7.7,6.7
1947,7.9,7.8,7.6,7.5,7.3,5.4,5,5.2,5.8,6.2,6.5,5.6
1948,6.6,6.9,6.2,6.3,6.9,5.7,4.9,5,5.3,6.7,6.6,5.9
1949,7.7,6.7,7,5.6,4.8,4.4,4,4.2,4.4,4.9,6,5.8
1950,5.7,5.2,5,5.1,4.4,3.7,3.9,4.2,4.8,5.8,5.8,5.7
1951,6.2,5.1,4.8,4.9,5.9,6,6.3,4.8,5.5,6.3,6.2,6
1952,6.9,6.4,6,5.4,5.1,4.1,4,4.7,5.2,6.1,5.6,6.2
1953,6.2,6.1,6.3,6.6,6,4.8,4.1,5.1,6.4,5.8,6.1,6.2
1954,6,6.2,5.7,5.5,4.6,4.4,3.7,4.1,5,5.6,6.9,6
1955,6.3,6.1,5.3,5,4.9,4.2,4,4.1,4.5,5.8,5.6,5.6
1956,5.3,5.3,5.6,4.7,4.4,4,3.9,4.3,4.4,5.5,5.7,6.1
1957,5.9,6.5,6.7,6.2,6.4,5.2,4.8,4.3,5,6.2,6.4,6.9
1958,7,7.3,6,5.8,5.2,4.5,4.3,4.5,5.3,5.5,5,6
1959,6.5,5.9,6,5.5,5.4,4.6,4.8,4.5,5,5.4,6,6
1960,6.4,6.1,5.9,5.1,4.8,4.6,4.6,4.6,4.7,5.8,6.1,6.6
1961,6.7,6.5,6.2,5.9,6.1,4.9,4.7,5.1,5.3,6.6,6,6.1
1962,5.8,5.9,5.6,6,5.6,4.8,4.8,5.6,5.8,6.2,7.4,6.6
1963,6.1,5.4,6.1,5.5,6.3,4.9,5.8,6.5,6.3,6.5,6.5,6.8
1964,7.4,6.5,6,5.9,4.6,4.2,4.3,5,5.7,6.3,6.6,6.6
1965,6.4,5.6,6.9,6.7,6.3,6.2,5.8,6.5,5.9,7.1,7.1,6.9
1966,7.2,6.7,6.7,6.2,5.5,5.1,4.7,4.9,5.4,6,6.6,6.1
1967,6.1,6,5.4,6,5.3,4.6,4,4.3,4.9,5.7,5.7,5.9
1968,6.4,5.9,5.2,5.2,4.7,4.2,4.8,5.2,5.5,6.4,6.2,6.4
1969,7.3,6.5,7,7.2,7.3,6,5.2,5.7,6.4,7.3,7.5,6.8
1970,6.6,7.1,6.2,6.1,5.6,4.9,4.4,5.1,5.7,6.4,6.3,5.6
1971,6,5.4,5.5,5.3,5.5,4.8,5,4.9,5.3,5.9,6.7,6.2
1972,6.3,7.2,7,6.2,6.5,6.2,6.6,6.4,6.4,7.2,7.2,8
1973,7.9,7.4,6.7,6.5,6.2,5.4,4.4,4.8,5.1,6,5.9,5.7
1974,5.6,5.6,5.3,5.6,5.1,4.6,4.3,4.4,4.7,6.1,6.6,5.2
1975,4.9,5.7,4.7,5.6,5,5,4.3,5.1,4.5,5.5,5.3,5.6
1976,6.4,6.1,6,6.4,6.6,6.6,6,5.5,5.5,5.8,7.1,7.4
1977,7.6,6.5,7.2,6.8,6.2,5.7,5.6,5.7,6.3,6.2,6.8,6.8
1978,6.6,7.3,6.8,6.2,6.2,4.4,5.1,5,5.7,6.8,7.3,6.5
1979,7.5,6.3,6.7,6.3,6.4,5.1,5.4,6.3,6.2,7.3,7.2,7.2
1980,7.4,6.7,7.2,6.6,6.7,5.7,5.6,5.6,6,6.5,6.7,7
1981,6.4,6.6,6.5,6.2,6.2,5.5,4.8,5.4,5.8,6.4,6.1,5.9
1982,6.6,6,5.8,6,5.6,5.6,5.6,5.8,6.3,7.3,6.8,8
1983,8.4,9.2,8.5,7.6,6.5,9.1,7.3,7.1,6.7,7.2,7.3,7.1
1984,6.6,5.9,6.4,6,5.7,6,5.2,4.6,6.5,7,6.8,7.1
1985,6.4,6.1,6.3,5,5.3,5.1,4.4,4.8,5.4,7,6.8,7.2
1986,6.8,6.3,5.6,6.6,5.5,4.9,4.6,5.5,5.8,6.8,7,7.1
1987,7.3,8,8,7.1,6.4,6.3,5.7,6.1,6.9,7.8,7.2,7.3
1988,7.1,7.5,6.5,6.6,6.1,5.6,5.1,5.6,5.4,6.2,6.9,6.8
1989,6.2,6.4,6.2,5.8,5.1,5.5,5,5.4,6.1,6.7,7,7.1
1990,7.1,7,6.8,6.6,6,5.6,5,5.6,6.4,6.4,6.9,6.5
1991,6.6,6.6,6.8,6.8,6.2,6.1,5.1,5.4,6.3,6.7,6.9,7.5
1992,8.1,7.7,8.6,9.1,8.5,6.7,5,5.5,5.8,7,7.4,6.7
1993,6.7,7.1,6.9,6.9,7.3,7,5.9,5.6,6,6.8,6.4,6.5
1994,6.8,6.5,6.6,6.8,6.3,5.9,4.9,5.3,6.2,7.1,6.8,7.4
1995,7.9,7.1,6.8,6.6,6.4,5.9,5.3,5.5,6.4,6.5,5.9,6.9
1996,6.5,6.9,6.5,5.7,5.4,5.4,4.5,5,5.6,6.3,5.9,6.4
1997,6.3,6.9,7.2,7.2,8.3,8.2,5.9,5.1,6.4,7.3,6.9,7.9
1998,7.8,7.7,8.8,8.6,7.4,6.6,6.2,6.7,6.1,7.2,6.8,7
1999,6.2,7.2,6.5,6.2,5.6,5.4,5.5,6.2,6.2,7.2,7,6.5
2000,6.3,6.1,5.9,5.6,5.8,5.3,4.8,6,6,6.8,6.7,6.3
2001,6.4,7.1,6.3,6.4,5.5,4.5,4.7,5.3,5.2,6.2,6.2,5.9
2002,6.4,6.6,7.6,7,6.5,5.1,4.7,5.5,5.8,6.8,6.5,6.5
2003,7.1,7.2,7.6,5.8,5.2,5.2,5.3,4.5,5.9,7,7.4,6.5
2004,7,6.9,6.4,6.5,5.1,5.2,5.8,6,6.7,7,7.1,7.1
2005,7.4,6.4,7,6.5,6.4,5.5,5.2,6.3,5.9,6.3,5.5,5.2
2006,7,6.5,7.4,6.1,5.3,5.8,6.9,7.3,6.2,6.6,7.2,6.8
2007,7.9,6.7,6.8,6.6,5.1,4.5,5,5.3,5.2,5.6,5.9,5.6
2008,6.9,6.7,7.2,6.2,5,5.2,6.7,7,6.5,6.7,7.1,6.9
2009,6.9,7.1,7.1,6.7,5.8,5.8,5.6,6.3,6.5,7,7.5,7.2
