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