1901,7.5,8,10.1,11.6,12.3,12.7,12.1,11.6,12.7,11.8,9.6,7.5
1902,7.2,7.9,10.7,12.2,12.9,12.9,12.2,11.8,12.9,11.3,9.7,7.8
1903,7.5,8.4,9.4,11.3,11.8,12.6,12,11.7,12.4,10.5,8.3,6.7
1904,7.2,9,10.8,12.1,12,12.6,11.5,11.6,12.3,10.6,8.3,7.5
1905,7,6.4,9.7,11.4,12.8,12.6,12,12.4,12.3,10.7,8.7,6.3
1906,7,7.7,9.5,11.5,12.3,12.7,11.9,11.6,12.5,10.6,8.5,7.5
1907,8.1,8.1,10.3,11.6,11.9,12.6,11.5,11.7,12.4,10.9,8.2,7.4
1908,7.2,7.7,10.1,11.9,12.7,13,11.8,11.9,12.1,10.4,8.2,7.5
1909,7.5,8.2,10.6,11.7,12.8,12.7,12,11.6,11.8,10.4,8.7,6.7
1910,6.7,7.2,8.8,10.8,11.8,12.3,11.6,11.8,11.9,10.3,8.1,6.6
1911,7.6,8,9.6,11.5,10.9,12.1,11.5,12,12.5,10.8,8.1,7.1
1912,7.1,6.9,9.4,12,12.3,11.8,11.6,11.9,12.1,10.7,7.6,7
1913,7.4,8.1,9.4,10.2,11.4,11.4,11.4,11.9,11.7,10.3,8.2,6.9
1914,7.4,7.6,8.4,11,11.5,11.7,11.7,11.7,11.9,10.7,8,6.7
1915,6.8,7.6,8.4,10.5,12.6,13,12.1,12.1,12.1,10.7,8.5,7.6
1916,8.3,7.9,9.7,11.1,12,12.5,11.6,11.2,11.6,9.9,7.3,6.8
1917,6.6,7.2,8.7,10.1,12,10.7,11,11.1,11.2,9.4,8.4,5.7
1918,6.1,7.7,7.6,10.8,11.6,11.2,11.2,11,11.3,10.7,8.2,6.6
1919,4.9,7.4,8.5,9.8,11.7,12.2,11.4,11.7,11.6,10.5,8.3,6.6
1920,5.8,7.6,9.5,11.9,10.7,11.2,11.6,11.4,11.6,10.1,7.9,6.2
1921,5.7,6.5,8.9,10.8,10.8,12.2,11.2,11.4,11.6,9.3,7.7,6.5
1922,6.7,7.7,9.3,11.6,12.2,11.3,11.3,11.6,11.7,9.8,8.1,6.5
1923,6.5,7.3,8.9,11.4,12.5,12.2,11.4,11.5,12.2,9.9,7.6,6.8
1924,6.1,6.7,9.8,11.3,10.9,12,11.5,11.6,11.2,9.6,6.8,6.5
1925,6,7.1,8,10.7,10.3,11.2,11.1,11.4,11.5,10.7,7.5,5.6
1926,5.9,6.3,8.9,10.3,10.6,12.7,12.8,12.6,11.8,10.6,5.7,5
1927,3.6,7,8.1,9.9,11.9,13.3,11.3,11.4,11.3,10.2,7.2,6.9
1928,5.6,7.2,8.4,10.6,11.2,12,11.2,11.1,11.8,9.8,7.2,4.6
1929,5.3,7.1,8.7,11,10.2,11.4,10.8,10.6,11.4,10.4,8.2,7.2
1930,6.6,7.7,9.6,9.2,11,11.2,10.4,9.5,11.9,9.9,6.1,5
1931,5.3,8,8.1,9.7,11.5,10.6,11.5,11.4,11.6,9.6,5.9,6.3
1932,5.4,7.1,7.8,9.7,11.6,11.6,10.8,11.8,12.1,9.8,4.8,5.2
1933,8.3,8.9,8.5,11.5,11.7,11,12.5,12.3,11.3,10.3,6.6,6
1934,7.1,8.4,9.6,10.2,11,12,11.8,11.7,11.9,9.6,6.9,6
1935,3.8,6.2,8.2,10.7,12.2,12.1,11.8,12.7,11.6,10.2,6.3,4.9
1936,6.2,8,10.5,11,10.3,12.3,13.3,11.9,12.2,10.8,7.4,4.8
1937,6.5,8.6,8.8,12.7,11.7,11.9,11.9,11.5,12,10.2,6.3,6.1
1938,5.6,7.5,9.3,11.3,11.5,12.1,11.9,11,11.3,8.9,7.1,4.5
1939,6.3,7.9,8.6,10.9,11.7,12.2,11.2,12.1,11,10.2,5.7,5.6
1940,4.9,7.9,8.1,13.3,13.6,12.4,12.3,12.6,11.6,9.6,8,5.7
1941,5.7,7.7,8.6,13.2,12.1,13.2,12.6,13.3,12.4,11.7,8.3,6.9
1942,5.8,7.9,7.7,12.4,13.5,12.6,11.7,12.2,11.8,10.5,7.8,7.7
1943,7,6.5,9.3,11.9,13.5,12,12,14,13.2,10.4,7.5,7.2
1944,7,9.9,10.8,12.9,13.3,13.1,13.7,11.7,14,10.2,9.4,7.5
1945,6.3,9.9,10.9,12.3,11.7,12.3,12.8,12.6,12.5,11.4,8.7,7.8
1946,7.3,8.6,8.2,11.4,12.3,11.4,10.2,12.3,11.6,10.2,8.9,7.2
1947,7.6,8.4,9.2,12.4,13.3,12.8,10.9,11.9,11.3,11.3,9.3,8.4
1948,7.4,9.1,10.2,11,12.8,13,12,11.8,12.8,11.1,10.1,8
1949,7.6,9.2,9.6,12.8,13.2,12.8,11.7,11.3,12.5,11.9,6.3,6.2
1950,7.3,8.4,9.1,10.9,12.6,11.7,11.3,11.1,11.7,10,6.9,4.6
1951,6.1,6.1,9.3,12.3,11.7,12.8,11.9,11.5,12.6,10,8.6,7.4
1952,8.8,8.1,9.8,12.2,12,12.9,11.1,11.9,11.5,8.4,9.3,6.7
1953,6.3,7.9,10.5,13,13.2,13.1,11.9,12.5,12.5,10.2,7.7,7.2
1954,8,7.3,9.2,11,11.7,12.7,11.5,11.7,12.2,10.5,7.7,6.1
1955,7.3,6.6,9.9,11.8,12.4,13.2,11.8,11.9,11.2,9,8.4,6.9
1956,6.6,8,9.3,11.5,12.1,12.4,10.9,11.1,11.4,9.9,8.6,7.3
1957,6.7,9.4,10.7,12.3,12.5,13.3,11.4,12.2,12,9.8,7.8,6.6
1958,7.5,7.8,10.8,12,12.3,12.9,12,11.5,12.2,12,9.5,8.7
1959,7.8,9.9,10.7,12.5,12.6,12.8,11.4,10.9,11.8,10.4,7.8,6.9
1960,7.6,7,9.1,10.4,11.4,12.4,11.6,12.2,12.1,11,8.6,7.9
1961,7.7,8.1,10.5,11.7,11.8,12.2,12.1,11.2,11.4,9.7,8.9,7.1
1962,6.2,6.9,8.7,11.2,10.9,11.8,11.1,11.6,11.4,9.2,7.4,7.1
1963,6.9,6.2,9.2,11.2,11.3,12.8,11.4,11.6,11.9,8.2,7.3,6.8
1964,6,7.8,9.9,11.2,11,12.2,10.5,11.3,11.7,8.4,8.3,7.1
1965,7.1,7.5,9.3,11.7,12.5,12.4,11.1,11,11.4,9.7,7.4,8.4
1966,7.5,8.6,9.9,12.5,12.6,12.1,11.3,11.2,11.9,10.3,6.9,6.5
1967,6.7,7.1,9.7,11.3,11.7,11.9,10.9,10.6,11.2,9.8,8.2,7.9
1968,7.9,7.4,8.7,10.4,11.6,11.8,10.6,10.6,11.8,10.1,8.1,7.1
1969,7.1,9.7,8.9,11.6,12.6,12.4,12.1,11.9,11.9,10,7.7,7
1970,7.2,7.6,9.9,12.4,10.9,11.7,11.1,11,11.8,10.3,7,5.9
1971,7.4,4.9,7.5,9.9,11.1,11.8,10.5,11.3,11.1,10.4,8.3,7.2
1972,7.3,7.4,10.1,12,13.1,12.3,11.4,11,12.2,10.7,10.1,7.7
1973,7.3,9,10.1,13,13.9,13.5,12.6,13,12.6,11.6,9.8,6.6
1974,8.7,7,10.2,11.7,11.8,13,11.2,11.3,12.9,9.1,7.5,7.2
1975,5.7,8.9,10.1,12.3,12.1,13,12.2,12.6,12.6,11.2,8.6,7.6
1976,6.2,7.8,10.6,13,13.3,13.3,12.9,11.9,12.8,12.1,8.4,7.4
1977,6.9,8.7,10.3,11.3,12.6,12.9,11.9,13.2,12.9,11.9,9.6,8
1978,7.6,8.6,10.1,14.1,12.7,12.9,12.9,13.1,12.6,11.9,10.7,9.4
1979,6.5,7.7,10.7,13.3,13,12.8,12.1,13.1,12.5,12,8.7,8.1
1980,8.8,7.8,10.4,12.7,13,13.2,12.6,10.2,12.7,12,8.4,7.5
1981,6.8,8.9,11.1,13.2,13.2,14.1,12.6,14.3,13.2,12.4,8.5,8.3
1982,7.9,9,11.4,12.9,13.6,13.5,12.5,12.8,13.7,11.6,9.6,8
1983,6.8,6.4,9.1,11,12.9,13.7,13.4,13.9,13.9,12,10.4,8.5
1984,7.3,8.7,9.2,12.3,10.9,12.5,11.7,11.7,12.1,11,7.8,7.6
1985,7.5,7.7,10.1,12.1,12.4,12.8,11.7,11.8,12,11.2,8.6,7.6
1986,6.9,8.3,8.5,11.3,11.9,12.2,11.5,10.7,12.1,10.8,9.6,7.6
1987,5.8,8.2,9.3,9.9,11.2,12.8,11.3,12.3,11.3,10.4,9.3,7.1
1988,7.2,8.2,9.8,11.2,11,11.2,11.6,12.6,12,10.5,8.4,6.6
1989,6.7,6.4,8.4,10.5,11.8,12.8,11.3,11.8,11.7,9.5,8.6,6.1
1990,7.4,8.6,9.7,11.1,12.1,12,11.3,11.4,11.8,10.9,9.4,7
1991,7.6,7.7,9.9,11.8,12,12.4,12.5,11.7,11.3,10.1,7.9,7.8
1992,7.7,7.2,10.7,12,11.7,12.4,10.8,10.9,11.5,10.2,8.5,7.5
1993,7.3,8.6,9.8,11.7,11.3,12.1,10.9,11.6,12.9,10.8,8.2,6.1
1994,7.3,8.5,9.4,11.4,12.5,12.8,11,10.9,12.2,10.3,9.1,8.1
1995,8.9,8.5,10.6,11.4,12.3,12.9,12.5,12.8,12.4,10.3,9.5,7.2
1996,5.8,6.9,9.4,10.7,12.2,11.8,12,12.6,12.7,11.3,8.5,6.9
1997,6.9,8,11.1,11.8,12.4,13,11.6,12.3,12,12.1,10.9,7
1998,7.9,8.2,9.1,11.9,11.1,12.4,11.8,12.9,13.4,12.7,11,7.5
1999,7.6,8.6,10.2,13.1,12.4,12.7,11.6,12.4,11.5,10.2,7.7,6.6
2000,7.2,8.3,10.6,11.3,12,12.4,11.8,12.1,11.7,11.8,9,7.2
2001,7,9,10.3,11.5,11.4,12.3,11.8,11.4,11.9,11.3,8.7,7.7
2002,6.9,8.1,9.7,12.1,12,13,11.9,11.6,12.2,11.6,9.1,7.5
2003,8.2,7.7,10.1,11.6,12.6,12.7,12,13,13.3,10.6,8.5,6.2
2004,7.4,7.8,11.1,12.2,12.3,12.9,12.1,13.1,12.1,12.2,9.2,6.7
2005,7.9,9.3,9.6,14,12.2,12.6,12,11.1,12,11.5,9.5,7.2
2006,7,7.4,10.3,12.1,11.3,13,11.7,12.7,12.4,12.4,8.8,7.7
2007,8.1,8.5,10.7,11.6,11.8,13.2,12.2,12.5,12.6,10.3,8.6,8.7
2008,7.4,9,10,11.5,12.5,12.1,11.3,12.9,12.3,10.6,8.4,7.1
2009,7.5,8.8,10.8,12.6,11.7,13.5,12.9,13.6,12.8,12.6,9.3,8.2
