1901,7.1,9.8,10.5,11,11.3,10.8,11.6,11.1,10.3,8.6,7.2,5.7
1902,5.3,8.6,9.4,10.1,9.7,10.2,12.3,12.4,10.6,8.2,6.8,5.5
1903,6.3,7,9,11.4,10,10.2,11.8,10.2,9.7,7.8,6.1,4.9
1904,6.2,7.5,8.3,11,11.1,10.4,11,11.4,9.8,8,6.6,5.5
1905,6.8,7.8,9.2,10.2,9,11.2,11.5,10.7,9.8,8.7,7.2,5.8
1906,4.9,9.5,9.3,9.3,11.6,12.3,11.6,11.4,10.1,6.8,5.8,2.9
1907,4.2,8,9.3,9.9,9.7,10.3,11.1,10.1,9.5,7.1,6.3,3
1908,5.9,6.7,10.9,12.3,13.4,10.9,11.1,10,10.9,10.5,5.8,4.3
1909,5.4,8.2,9,9.4,9.8,9.8,10.7,11.4,9.9,6.5,5,5.1
1910,4.9,6.8,8.6,11.6,10.9,10.5,12.4,11.8,9.7,6.6,5.3,5.7
1911,5.6,6.2,9.2,10.9,12,11.7,11.4,11.2,9.6,7.4,6.4,5.5
1912,4.7,7.8,7.9,10.2,10.8,10.2,10.5,10.6,9.6,7.8,7,5.5
1913,6.2,7.1,8.3,10.5,9.2,9.2,11.3,10.8,9.9,7.9,5.9,5.2
1914,6.4,8.3,10.6,10.3,9.4,11.3,10.9,10.4,9.6,8.5,6.5,5.9
1915,7.2,8.5,9.5,10.3,10.7,10.9,11.1,10.5,9.9,8,7,5.5
1916,5.3,8.2,9.2,10.7,10.6,10.8,11.2,10.3,9.4,7.5,6.5,5.5
1917,6.1,8.4,9.6,10,10.5,10.6,10.9,10.4,9.2,6.9,6.1,5.3
1918,6,7.7,8.8,9.6,10.8,10.8,10.9,10.8,9.8,8.2,7.1,6.3
1919,8.1,9.1,10.5,10.5,11,11,10.8,10.7,9.7,8,6.5,5.8
1920,6.5,7.7,9.4,10.6,10.6,10.9,10.7,10.1,9.3,7.9,6.6,5.9
1921,6.4,7.6,8.8,11.2,10.3,10.5,11,10.3,9.8,8.1,6.8,6.5
1922,6.7,8.3,9.4,10.4,10.9,11.4,10.9,10.7,9.7,8.1,6.9,5.7
1923,7.4,7.6,10,9.9,10.6,10.8,10.5,10.1,9.3,7.6,6.3,5.7
1924,6.8,8.6,10.5,10.7,10.4,11,10.9,10.8,9.5,8.3,6.8,6.4
1925,5.7,7.7,9.9,10.6,10.6,10.6,10.9,10.6,10,8.3,7,6.3
1926,6,7.9,9.3,9.9,11.2,11.1,10.9,11.1,10.3,8.2,6.5,5.9
1927,7.5,7.8,9.9,9.7,10.6,10.9,10.8,10.5,9.8,8.6,7,6.9
1928,7.8,9,10.5,10.9,10.9,11.2,11,10.6,10,8.3,6.7,6.1
1929,7.3,9.2,9.9,11.4,10.8,10.8,10.3,10.4,9.7,8.1,6.8,5.3
1930,5.5,8.4,9.3,10.4,10.7,10.3,10.5,10.2,9.9,8,5.7,5.8
1931,6.4,8.7,9.6,10.1,10.6,10.8,10.6,10.7,9.6,8,7.1,6.1
1932,6.8,8.5,9.7,11,10.7,10.7,10.8,10.2,9.6,8,6.8,5.7
1933,7.1,8.9,9.9,10.2,10.7,10.9,10.8,10.6,9.9,8.2,7.6,6.3
1934,6.8,8.1,10.1,10.4,10.8,10.7,10.5,10.6,9.8,8.3,6.8,5.7
1935,7,8.3,10.4,10.4,10.5,10.7,10.6,10,9.6,8.2,6.6,6.1
1936,6.2,8.6,10.5,11,11.3,10.9,10.5,10.4,9.7,8.4,6.9,6.1
1937,6.5,8.8,9.9,10.8,11.1,11.1,10.9,10.7,9.7,8.4,7.7,6.9
1938,7.5,8.9,9.2,10.9,10.5,11,11,10.6,9.8,8.6,6.8,6.4
1939,7.1,9.1,10.1,11.3,12,11.4,11,10.6,9.4,9,7.1,6.7
1940,8.1,9.8,10.4,11.3,11.9,11.9,11,10.9,10.4,8.7,7.1,7.4
1941,6.9,8.9,10,11,10.6,10.5,11.2,10.4,9.7,8.5,7.1,5.3
1942,6.6,9.1,9.6,11.3,10.6,11.3,9.6,9.9,9.2,8.2,7,6.3
1943,6.2,7,8.4,9.5,10.5,9.6,10.9,10.1,9.3,7.9,7.3,7
1944,7.1,8.6,10.2,11.2,10.9,11,10.4,10.2,9.2,8.4,6.1,5.6
1945,6.9,7.2,9.3,10.7,10.9,10.3,10.5,9.8,8.7,7.5,6,5.9
1946,6.7,9.4,9.7,10.1,11.4,10.3,11.3,10.7,10.5,8.9,7.4,6.6
1947,7.5,9.1,10,10.2,10.9,12.3,11.5,11.3,9.8,8.3,8,6.7
1948,8.4,10.2,8.7,11.7,11.5,9.6,10.6,10,9.6,7.7,6.5,6.6
1949,8,8.8,11.1,11.7,11,10.7,10.5,10.5,9.2,8.8,7.3,6
1950,6.6,8.2,10.7,11.8,11.7,11,10.6,10.1,9.2,7.4,6.2,6
1951,7.4,10.3,11.9,11.4,12.7,11.8,11.4,10.5,7.1,10.2,9.3,7.7
1952,7.8,9.3,10,11.3,12.5,11.5,11.6,9.9,10.7,7.6,7.1,7.2
1953,7.9,10.7,11,12.3,13,12.7,10.9,11.3,11,8,8.7,9.2
1954,7,10.5,11.2,12.7,12.4,12.9,10.7,10.9,11.8,9.8,9.3,8.3
1955,9.6,10.2,11.7,12.4,13.8,12.2,12,10.8,11.6,9.9,7.6,8.5
1956,6.1,9,13.1,11.1,11.5,10.4,10.9,10.4,9.3,8.8,5.8,5.7
1957,6.5,8,10.6,11.1,10.8,11.3,10.6,10.5,9.7,9.2,8.3,6.9
1958,8.9,9.3,10.4,11.7,11.8,11.6,11.3,10.9,10.4,8.4,7.3,7.5
1959,8.5,9.6,10.1,11.4,10.8,10.8,10.8,10.2,9.9,8.5,6.9,6.1
1960,6.2,8.8,9.8,10.7,11.2,9.5,10.8,10.8,9.8,7.9,6.8,7.2
1961,5.9,7.6,9.5,11.1,10.8,10,9.9,9,9,7,6.6,5.8
1962,4.6,5.9,9.5,9,10.4,9.1,9.9,8.9,8.7,6.2,6.8,5.6
1963,6.5,9,10,11.1,10.6,10.6,11.1,11.2,10.3,8.6,8.9,7.2
1964,7.8,8.5,10.2,10.2,11.1,10.7,9.6,10.1,10,8.2,6.1,6.2
1965,6.9,7.6,9,11,11.5,11.4,10.8,10.7,9.7,7.7,7.6,5.7
1966,7.2,9.5,9.7,11.2,10.8,10.6,10.9,11.4,9.8,8.6,6.9,4.7
1967,5.1,8.1,9.8,10,10.8,10.8,10.2,10,9.4,7.8,7.5,4.4
1968,4.8,7.6,8.6,9.6,10.1,10.4,9.6,10.1,9.4,8,6.9,5.7
1969,8.1,9.2,10.8,11.5,12.1,11.4,10.9,10.4,10.2,8.5,7.3,5.7
1970,7.8,9.1,9.9,10.9,11.1,12.1,11.3,11.1,9.9,9,5.6,5.3
1971,6.8,7.6,9.5,10.4,10.7,10.8,10.6,10.2,9.4,8.2,6.7,5.5
1972,7.4,8.1,9.4,10.2,10.8,10.5,11.3,10.6,9.7,8.7,7.4,6.9
1973,7.2,8.9,11,12.3,12,11.8,11.4,11,10,8.4,6.7,4.6
1974,6.6,8.3,9.9,10.7,11.2,10.4,10.1,10.4,9.1,8,5.2,5.1
1975,6.3,10.4,10.4,10.9,11.3,10.2,10.3,9.6,9.6,8.1,6,4.8
1976,6.4,9,10,10.8,10.3,11.2,10.5,10.4,9.9,8.3,8.2,7.4
1977,8.5,9,10.3,11.4,10.9,11.2,10.8,10.4,9.7,9.3,7,6.2
1978,6.1,8.4,9.7,10.9,11,11.3,10.5,10.4,9.6,8.9,7.2,7
1979,8.1,9.3,10.5,11,11.5,11.4,11,10.8,10.2,8.4,6.2,7.1
1980,8.1,9.9,11.4,11.7,12.5,12,11.4,11,10.9,9.7,8.5,7.5
1981,6.4,7.4,9.7,10.1,10.3,10.2,9.5,9.5,8.3,4.9,4.5,4.7
1982,7.9,9.8,10.5,11.1,11.8,12.1,11.9,11.2,10.8,8.6,8.8,7.7
1983,6.8,9.9,11.5,12,11.9,12,12,12.2,11,9.2,8,6
1984,6.4,6.5,9.6,11,10.5,10.2,9.7,10.5,9.5,7.9,5.8,4.3
1985,5.5,5.9,9.7,9.4,9.4,10.8,10.8,10,9.5,8.8,4.9,6.6
1986,6,10.4,10.4,11.3,11.7,11.7,11.4,10.8,9.9,8.3,7.3,6.7
1987,6.8,9,12,11.5,11.7,11.5,11.7,11.5,10.8,9.3,7.1,7.1
1988,8.3,11.3,10.7,11.5,11.1,11.5,11.6,11,10.3,8.9,5.7,5.5
1989,5.5,8.1,10.2,10.4,10.6,10.2,10.9,10.5,9.6,8.1,6.5,8.8
1990,7.2,9.9,10.1,10.6,12,11.1,11.4,11,10.1,7.8,7.1,5.7
1991,8.2,10.1,10.9,12,12.5,11.5,11.9,11.3,10.2,8.5,6.8,8.2
1992,5.6,8.9,10.8,12.2,13.3,12.7,12,11.6,10.3,9.1,7.5,6.1
1993,7,8.3,11,11.1,11.5,11.7,11.6,11.5,10.2,8.6,7.8,4.8
1994,7.4,8.7,9.9,12.2,12,12.2,11.6,11.3,9.6,8.2,6.8,5.9
1995,6.7,9.3,9.6,11.8,12.7,11,11.8,11.6,10.5,8.5,7.2,7.5
1996,8,9.5,11.1,12.3,11.4,11.7,11.6,10.9,10.6,8.7,6.7,5.4
1997,7.4,8.6,10.6,10.6,11.7,11.4,11.3,11.5,9.5,8.2,7.6,5.3
1998,7.8,10.6,9.5,11.7,11.6,11.6,11.1,11.5,9.8,8.1,4.9,4.4
1999,5.7,7.9,9.7,11.4,10.7,11.8,10.8,9.3,9.8,7.6,5.1,5.4
2000,4.8,6.9,9.9,12.2,10.8,10.7,11.7,10.7,9.8,7.5,8.4,4.9
2001,7.6,7.2,10.5,12,10.9,11.1,10.8,10.4,9.9,7.6,5.7,5.7
2002,6.1,9.5,10.1,12.2,12.5,11.1,11.4,10.9,9.5,7.9,8.6,7.5
2003,7.6,9.5,10.6,11.3,11.6,11.9,11,11.3,10.6,7.8,6.6,6.4
2004,7.9,7.7,9.8,10.9,10.8,10.2,11.1,11.1,9.8,7.9,6.3,6.4
2005,6,8.6,10.8,11.5,11.5,11,11.4,11.3,10.3,8.3,6.6,5.9
2006,7.7,9.7,9.8,11,11.7,11,11.4,11.3,10,9.1,7.3,6.1
2007,7.1,8.9,9.7,10.9,11.4,11.3,11.7,11.5,10.9,7.7,7.6,5.6
2008,7.1,7.6,9.5,11.1,11.4,11.5,11.2,11.2,10.4,8.5,6.4,6.2
2009,7,8.8,11.9,11.4,12,12,11.8,11.1,10.6,8.3,7.9,7
