1901,22,21.5,21.6,21.6,19.4,16.9,15.6,15.6,17.7,19.2,18.6,20.1
1902,22.2,22.3,21,19.1,17,16.3,15.2,14.6,15.4,17.6,18.7,21.8
1903,22,22.9,21.6,20.2,18.6,17.2,16.5,15.9,16.5,18.7,19.3,20.9
1904,21.2,21.5,21.2,20.2,17.1,15.9,15.5,15.5,15.3,16.5,18.5,19.7
1905,20.6,21.8,20.2,18.8,17.9,16.8,14.9,15.6,16.1,17.1,18.7,22.3
1906,22.1,20.9,20.9,20.1,17.9,16.1,15.4,15.7,16.9,18,20.2,21.4
1907,22.8,21.8,23.2,20.5,18.2,17.7,15.9,15.2,15.7,18.5,20,21.8
1908,21.4,21.8,21.5,20.1,18.9,16.9,15.4,16.1,17,16.7,19.4,20.2
1909,22.3,22.7,20.7,20.5,18.1,17.6,17.5,16.4,17.4,18.2,20.4,21.5
1910,22.8,23.7,23.5,21.3,19.2,18.1,17.3,16.4,17.2,19.5,20.7,21.9
1911,21.4,21.7,21.3,20,18.1,16.8,15.6,15.6,16,17.7,19.2,20.6
1912,21.4,21.8,21.4,20,18.1,17,15.6,15.6,16,17.7,19.1,20.5
1913,21.4,21.7,21.3,20,18.1,16.8,15.6,15.5,16,17.7,19.2,20.6
1914,21.5,21.8,21.4,20.1,18.2,16.9,15.5,15.6,16,17.6,19.2,20.6
1915,22.2,22.7,21.6,20.3,18.4,17.2,16.2,16.1,16.1,18.3,19.9,21.2
1916,21.6,22.4,21.9,20.6,18.4,17.5,16,15.9,16.5,18.4,19.7,21.1
1917,21.7,21.9,21,20.3,18.3,16.9,15.8,15.8,16.6,18.3,19.5,20.6
1918,21.7,21.8,21.2,20.2,18,16.9,15.3,15.4,16,18.1,19.5,20.4
1919,21.4,22,21.3,19.9,18.2,16.7,15.6,15.5,16.1,18,18.9,20.4
1920,21.9,22,21.5,20,17.7,16.6,15.8,15.9,16.1,18.2,19.9,20.8
1921,21.9,22,21.5,20,18.3,17.1,16,16.3,16.1,18,19.3,20.8
1922,21.8,21.4,21.3,19.5,17.8,16.4,15.6,16,16.3,17.7,19.3,20.9
1923,21.4,21.8,21.9,19.7,17.8,16.4,16,15.7,15.9,17.7,19.2,20.6
1924,21.4,21.5,21.5,20,18.4,17.1,15.9,16,15.9,17.5,19.4,20.7
1925,21.5,21.7,21.4,20.3,18,16.8,15.6,15.8,16.4,18.1,19.4,20.9
1926,21.4,22.2,21.9,19.8,18.2,17,15.7,15.8,16.3,17.6,18.8,20.3
1927,21.7,21.7,21.5,20.2,18.2,16.4,15.8,15.8,16.2,17.4,18.8,20.4
1928,21.2,21.5,21.3,20.4,18.3,16.7,15.8,15.7,15.9,17.6,18.9,20.3
1929,22,22.1,22,19.9,17.7,17,15.4,15.5,15.8,18,19.3,21
1930,22,21.9,21.5,20.2,18.4,17.5,15.9,16.1,15.7,17.3,19.2,20.1
1931,21.5,22.1,21.3,19.7,18.2,16.7,15.8,15.7,16.2,18.3,20.2,21.4
1932,21.9,22.1,21.5,20.8,18.1,16.7,15.8,15.9,16.4,17.7,19.5,21.1
1933,22.4,22.4,22,19.9,18.4,16.5,16.1,14.9,16,18.1,19.1,21.4
1934,21.1,20.5,21.1,19.7,18.2,17.4,15.8,15.6,16.4,17.9,19.3,21.1
1935,22.6,22.7,22.2,20,17.6,16.4,15.5,15.4,16.3,18.2,18.1,21
1936,21.5,21.2,21.2,20.4,18.5,16.8,15,15.5,15.4,17.5,18.6,20.6
1937,21.4,21.3,20.9,19.2,17.4,17.3,15.3,15.8,15.6,17.5,19.6,20.6
1938,21.7,21.4,21.8,19.8,18.3,16.8,15.9,15.7,15.8,18.2,19.9,20.9
1939,21.1,21.6,21.9,20.4,18.9,17.5,14.9,15,15.1,16.5,18.8,19.9
1940,21,21,21.3,19.2,18.2,16.3,14.3,14.9,15.2,17.6,18.2,21
1941,21.7,23.3,22.6,20.4,17.8,16.3,15.7,14.9,16.5,18.1,20,21.7
1942,22.1,23,23.2,21.7,18.7,17.9,17,16.4,16.5,19.2,19.9,21.3
1943,22.2,21.9,21.9,20.3,19,17.5,15.5,15.2,15.6,19,20.6,20.9
1944,22.8,22.5,21.6,20.4,18.4,16.6,15.9,16.2,16.1,17.6,19.9,20.8
1945,21.3,21.4,21.7,20.8,17.8,16.4,15.3,15.5,15.7,16.9,19,20.3
1946,23,22.9,22,21.3,18.3,17.1,15.1,15.7,16.9,18.1,19.4,21.8
1947,23.3,22.4,21.9,21.4,18.7,16.7,14.4,16.6,17.4,18.1,19.9,22.1
1948,22.3,21.4,22.3,20.7,18.7,17.1,16.4,16.1,16.8,18.7,20.4,20.7
1949,21.5,23,22.8,19.9,18.4,19,17.3,15.8,17.1,18.7,19.5,21.6
1950,22.3,22.9,21.7,20.3,19.7,18.7,16.5,17.2,16.2,18.3,18.9,21
1951,21.2,21.8,20.6,19,16.6,15.7,15.5,15.6,15.7,17,19.6,21
1952,21.9,21.8,21.5,20.4,18.6,17,15.7,15.4,15.8,18.2,20.1,20.8
1953,20.6,21.6,20.5,18.9,18.5,16.3,14.5,16.1,16.2,18.5,20.4,20.9
1954,22.1,22,21.2,19.2,18.1,16.8,16,15.1,16.2,16.9,19.6,20.1
1955,21,22.2,21,20.2,18.7,16.1,14.5,15.6,16.8,18,19.9,21.8
1956,21.7,22.7,21.5,20,17.9,17,14.9,14.8,15.9,17.8,18.5,21.5
1957,21.2,22,20.6,20,17.6,15.1,15,15.9,15.5,17.4,19.2,20.4
1958,21,22.5,22.2,20.2,17.9,18.1,15.4,16.2,16.3,17.2,18.3,21
1959,21.9,21.3,20.9,19.2,16.3,16,15.8,15.2,16.4,17,20.3,22.3
1960,21,21.6,21.2,19.2,18.6,16.1,15.2,15.2,16.3,17.7,18.9,19.7
1961,21,22.2,21.7,20.1,17.4,17.2,15.9,15.1,16.5,18.2,20.5,21.7
1962,22.6,22.4,21.6,20,19.9,16.9,16,15.5,16.2,18.3,19,20.7
1963,22,22.6,22.1,19.9,19,17.4,15.5,15.8,15.5,16.8,18.9,20.1
1964,21.8,22.4,22.1,20.2,18.3,17.1,16.2,16.1,16.2,18,19.7,20
1965,21.1,21.8,20.2,19.4,17.5,16.2,15.2,15,15.8,16.9,18.5,20.3
1966,21.1,22.1,20.5,19.1,16.9,16.2,15,14.7,15.4,16.7,18.4,20
1967,21.5,21.9,22.2,19.7,18.2,17.6,16.1,17.2,16.2,18.4,18.9,20.9
1968,21.2,21.2,21.3,19.4,18.5,16.4,15.4,15.5,15.4,17.7,19.1,20.8
1969,21,21.3,20.6,20.3,19,17.2,15.3,16.1,16.3,17.1,19.4,21.1
1970,22.6,21.6,22.5,20.3,18,17.5,15.7,17.4,17.5,19.1,19.6,21.2
1971,21.7,22,21.1,18.9,17.9,16.9,15.4,16.1,16.9,18.5,18.8,20.2
1972,21.3,21,21.8,19.9,18.1,15.8,14.9,15.1,15.9,17.3,19.9,20.2
1973,22,22,21.6,19.6,18.7,18,16.6,16.6,17,18.6,20.7,21.3
1974,21.9,22.1,21.5,20.4,18.2,17.3,15.8,15.5,16.3,17.5,19.7,20.1
1975,21.6,21.2,21.7,20.5,18.6,16.9,15.9,16,17.2,17.8,19.4,21.2
1976,22.4,21.5,21.9,20.2,18.6,17.2,15.5,15.7,15.1,17.5,19.1,20.9
1977,21.4,21.4,21.3,19.6,17.9,16.6,15.7,15.6,15.2,16.8,19,20.1
1978,21.4,21.5,21.3,20.2,17.8,17,15.7,15.5,15.8,16.8,18.8,20.1
1979,20.6,21.3,21.8,19.7,17.6,17.1,15.5,14.5,15.5,17.4,19.4,20.5
1980,22.1,23,21.4,19.2,18.7,16.2,15.1,15.1,15.7,17.4,18.9,19.9
1981,20.6,22.2,21.9,20,18.1,16.5,15,14.8,15.5,17.5,18,21.4
1982,22.1,21.8,21.2,19.5,17.7,15.6,14.5,15,15,16.6,19.3,20.3
1983,22,20.6,21.1,20.5,18.5,16.6,14.8,15.3,16.6,18.1,19,20.1
1984,20.4,21.1,21.3,20,18.3,17.6,16.1,15.7,15.8,17.5,19.9,21.3
1985,22.1,22.7,21.1,21,18,16.1,15.3,15.4,15.7,17.5,19,20.3
1986,22.4,22.1,20.9,20,17.9,16.4,15,15.1,15.2,17.6,19,19.9
1987,20.4,20.9,20.2,19.2,18.8,16.5,15.3,15.8,15.6,17.6,18.6,20.4
1988,21.5,21.7,20.9,20.6,19.1,18.1,16.5,16.4,17.2,19.3,20.4,21
1989,21.5,21.9,20.9,20,17.9,17.5,15.2,15.2,15.8,17.5,19.3,21
1990,21.9,21.9,22.6,20.7,19.1,16.9,16,16.1,15.6,17.6,19.6,21.4
1991,22.1,22.5,21,19.6,17.6,16.5,15.6,15.7,16,17.2,18.3,20.5
1992,22,22.3,21.5,19.8,17.8,17,15.4,15.3,15.9,16,18.6,20
1993,20.7,21,21.5,19.2,18.1,16.3,16.2,15.3,15.3,16.9,18.8,20.4
1994,22.1,21.7,21.4,19.5,17.5,16.1,14,15.3,14.7,16.8,19,19.9
1995,21.7,22.1,22.4,21.1,18.5,16.6,16,16,16.5,18.5,20.2,21.6
1996,22.2,22.4,22.2,21.5,18.4,16.8,15.8,15.4,17.1,18.2,19,21.7
1997,21.3,21.7,22,19.6,18.9,17.1,14.9,14.8,15.9,17.3,19.9,22.2
1998,22.2,22.7,22.3,21.6,20,18.3,17.3,17.4,17.6,18.8,19.6,21.4
1999,22.4,22.9,22.7,21,20,16.6,17,15.8,17.2,18.6,19.1,19.9
2000,21.3,21.8,21.6,20.4,19.5,16.7,15.4,15.7,16.4,18.3,19.4,20.5
2001,21.6,22.3,22.7,20.1,18.6,16.5,15.9,15.9,16.7,18.3,20.2,21.4
2002,23,22.7,21.6,20.7,18.2,18,15.3,15.9,16.6,18.1,18.8,20.8
2003,21.2,22.1,22.1,20.6,19.4,17.6,15.8,15.3,15.9,17.8,19.1,21.4
2004,22.1,23.4,21.8,20.2,18.9,17,15.2,15,16.1,18.3,18.7,20.3
2005,22.9,22.4,21.1,20.1,19,16.4,15.8,15.2,16.5,17.9,18.9,21
2006,21.8,21.7,21.7,21.3,18.2,16.3,14.6,15.4,15.8,17.1,19.9,19.9
2007,20.9,22.1,21.7,19.9,18.6,18.6,15.8,16.7,17.5,18.5,19.7,21.3
2008,22.8,22.8,22.1,21.1,17.6,16.8,16.6,16.3,16.9,17.8,20.1,21.7
2009,22.3,23.3,22.3,20.3,17.5,17.2,15.9,15.5,16.6,17.1,18.7,21
