1901,21.9,21.3,21.5,21.4,19.3,16.9,15.7,15.6,17.6,19.1,18.9,20
1902,22.1,22,21,19.2,17.3,16.4,15.4,14.8,15.7,17.7,19,21.5
1903,21.9,22.5,21.5,20.2,18.6,17.1,16.4,15.8,16.6,18.6,19.5,20.7
1904,21.2,21.4,21.1,20.2,17.4,16,15.6,15.5,15.6,16.8,18.8,19.7
1905,20.8,21.6,20.3,19,18,16.8,15.1,15.6,16.3,17.3,19,21.9
1906,22,20.9,20.9,20.1,18,16.2,15.5,15.7,16.9,18.1,20.2,21.1
1907,22.6,21.6,22.9,20.4,18.3,17.6,15.9,15.3,16,18.5,20,21.4
1908,21.4,21.6,21.4,20.1,18.9,16.9,15.5,16,17,17,19.5,20.1
1909,22.1,22.3,20.7,20.4,18.2,17.5,17.2,16.3,17.3,18.2,20.4,21.1
1910,22.6,23.1,23.1,21.1,19.1,17.9,17.1,16.3,17.2,19.4,20.6,21.5
1911,21.3,21.4,21.2,19.9,18.2,16.7,15.6,15.6,16.2,17.8,19.4,20.5
1912,21.4,21.6,21.2,20,18.2,17,15.6,15.6,16.2,17.8,19.3,20.3
1913,21.3,21.4,21.2,19.9,18.1,16.8,15.7,15.5,16.1,17.8,19.5,20.4
1914,21.4,21.5,21.2,20.2,18.3,16.9,15.5,15.6,16.2,17.7,19.3,20.3
1915,21.8,22.2,21.3,20.1,18.3,17,16,15.8,16.4,18.1,19.8,20.7
1916,21.5,21.9,21.5,20.3,18.3,17.1,15.9,15.7,16.4,18.1,19.7,20.7
1917,21.7,21.6,21.1,20.1,18.3,16.8,15.8,15.6,16.6,18.1,19.6,20.4
1918,21.6,21.6,21.2,20,18.1,16.9,15.5,15.5,16.2,18,19.5,20.3
1919,21.5,21.7,21.2,19.9,18.3,16.8,15.6,15.5,16.2,17.9,19.3,20.3
1920,21.7,21.7,21.3,19.9,17.9,16.6,15.8,15.8,16.3,18.1,19.7,20.6
1921,21.8,21.7,21.4,20,18.3,17,16,16,16.2,18.1,19.5,20.5
1922,21.7,21.5,21.1,19.7,18,16.5,15.5,15.8,16.4,17.7,19.4,20.6
1923,21.4,21.5,21.7,19.6,18,16.4,15.9,15.6,16,17.7,19.3,20.4
1924,21.3,21.4,21.3,20,18.4,17.1,16.1,15.9,16.1,17.6,19.4,20.4
1925,21.3,21.6,21.3,20.2,18,16.8,15.6,15.8,16.4,18.1,19.4,20.7
1926,21.2,22,21.6,19.8,18.3,17,15.8,15.9,16.3,17.8,19,20
1927,21.5,21.5,21.3,19.9,18.1,16.4,15.8,15.5,16.1,17.7,19.1,20.1
1928,21.1,21.3,21.2,20.3,18.3,16.7,15.7,15.7,16,17.8,19.1,20.1
1929,21.7,21.7,21.5,19.7,17.9,16.8,15.5,15.4,16,18,19.2,20.6
1930,21.6,21.7,21.4,20.1,18.5,17.3,16.1,16,16,17.4,19.4,19.9
1931,21.5,21.7,21.2,19.6,18.2,16.9,15.8,15.7,16.5,18.4,20,20.8
1932,21.8,21.8,21.3,20.5,18.3,16.4,16,15.9,16.3,17.6,19.7,21
1933,22.3,22.1,21.6,19.8,18.4,16.4,16.1,14.9,16.1,18.1,19.3,20.8
1934,21.2,20.6,20.9,19.5,18.3,17.4,16,15.5,16.5,18,19.4,20.7
1935,22.1,22.4,21.7,19.8,17.5,16.3,15.7,15.6,16.3,18.4,18.8,20.6
1936,21.4,21.1,21.3,20.3,18.5,16.5,15.2,15.5,15.5,17.6,18.9,20.7
1937,21.4,21.2,20.7,19.3,17.5,17.2,15.7,16,16,17.8,19.6,20.4
1938,21.8,21.2,21.5,19.6,18.2,16.9,16.2,15.7,16.1,18.4,19.8,20.7
1939,21,21.6,21.6,20.2,18.8,17.2,15.3,15.3,15.4,16.7,19.2,20
1940,21.1,21.1,21.2,19.5,18.3,16.6,14.6,15.1,15.5,17.6,18.6,20.7
1941,21.6,22.9,22,20.4,17.9,16.2,15.7,15,16.5,18,20,21.2
1942,22.2,22.8,22.8,21.3,18.7,17.7,16.6,16.2,16.4,19.1,19.8,20.9
1943,21.9,21.6,21.5,20.1,19,17.1,15.6,15.3,15.8,19.2,20.6,20.3
1944,22.3,22,21.5,20.3,18.5,16.7,15.8,16,16.4,17.6,19.9,20.6
1945,21.3,21.3,21.6,20.7,17.9,16.6,15.6,15.7,15.8,17.4,19.1,20.2
1946,22.7,22.6,21.8,20.9,18.3,17,15.3,15.7,17,18.2,19.6,21.5
1947,22.9,22.1,21.9,21.2,18.8,16.9,14.9,16.5,17.4,18.2,20,21.5
1948,22.2,21.2,21.6,20.3,18.6,17.1,16.1,16.1,16.7,18.5,20.1,20.3
1949,21.5,22.3,22.2,20.3,18.2,18.5,17,15.8,16.9,18.4,19.6,21.2
1950,22.2,22.4,21.5,20.2,19.1,18.3,16.5,16.9,16.3,18.3,19.3,20.7
1951,21.5,21.5,20.6,18.7,16.3,15.8,15.4,15.3,15.6,17.4,19.9,21
1952,21.3,21.4,21.6,19.9,18.1,16.6,15.3,15.5,15.9,18.5,20.1,20.6
1953,20.8,21.5,20.6,18.8,18.1,15.9,14.2,15.9,16.4,19,20.4,20.3
1954,21.8,21.3,20.6,19.4,18.2,16.8,16.1,14.6,16.2,17.2,19.3,19.6
1955,20.6,21.5,20.9,19.8,18.5,15.7,14.4,15,16.9,18.2,19.7,21.3
1956,21.2,22,21.2,19.8,18.3,16.5,14.9,14.9,16.2,18.2,18.6,20.9
1957,21.3,21.7,20.1,19.7,17.1,14.6,14.8,16,15.5,17.4,19.3,20.4
1958,21.1,22.1,21.6,20.3,17.8,18.1,15.2,16,16.9,17.1,18.1,20.3
1959,21.5,21,20.7,18.6,16,15.9,16,14.7,15.8,17.4,20.2,21.6
1960,20.7,21,20.7,19.1,18.5,16.3,15.4,15.6,16.9,17.9,19,19.6
1961,21.1,21.9,22,20,17.7,17.6,16,15.3,16.7,18.3,20.3,21
1962,21.8,21.7,20.7,19.7,19.8,16.5,16.5,15.7,15.9,17.9,18.4,19.9
1963,21.7,22,21.5,19.4,18.6,17.2,15.2,15.5,15.3,16.4,18.3,19.5
1964,21.5,22.4,21.8,20.6,18.4,17.2,16,16,15.8,18.1,19.9,19.4
1965,20.7,21.5,20.3,18.6,16.8,16,15.2,14.2,15.3,16.3,18.2,20
1966,20.5,21.5,20.6,19.2,16.8,15.8,14.9,14.7,15.4,17.1,18.7,19.3
1967,21.6,21.8,22.1,20,18,17.1,15.9,16.8,16.6,18.3,18.7,20
1968,20.9,21.3,21.1,18.8,18.1,16.1,14.9,15.3,15.4,17.5,19,20.9
1969,20.9,20.9,21.3,20.8,19.3,17,15.8,16.2,16.4,17.4,19.6,21
1970,22.2,21.5,22.3,20.4,18,17.5,15.7,17.6,17.5,19,19.6,21
1971,21.5,21.8,21.3,19,17.7,16.9,15.8,16,17.4,18.3,19.3,20.1
1972,21.2,21.3,21.8,19.9,18.1,15.9,15.2,14.6,16,17.6,19.9,20.1
1973,21.6,21.6,21.4,19.4,19.1,17.7,17.2,16.5,17.3,18.9,20.5,20.9
1974,21.8,21.8,21.1,20.1,18.2,17,15.7,15.2,16.3,17.6,19.5,19.5
1975,21.4,20.6,21.2,20.6,18.9,16.5,15.8,15.9,17.1,17.9,19.4,20.5
1976,22.2,21,21.3,20.3,18.6,17,15.5,15.6,15.3,17.4,19.4,20.2
1977,21.4,21.4,21.1,19.4,17.6,16.5,16.4,15.7,15.5,16.4,18.9,20
1978,21.4,20.9,21.2,20,17.7,16.9,15.8,15.4,15.8,16.7,18.8,20
1979,20.8,21.1,21.7,19.7,17.6,17,15.5,14.1,15.6,17.9,19.5,20.3
1980,22.4,22.7,21.6,19,18.7,16.1,15.3,15.2,15.7,17.6,19.1,20
1981,20.9,22.4,21.9,19.7,18.3,16.8,15.1,14.8,15.8,18.2,18.7,21.5
1982,22.1,21.5,21.6,20.2,18.2,16.2,14.7,15.5,15.3,17.3,20.1,20.4
1983,22.1,20.8,21,20.6,18.5,17,15.5,15.5,16.8,18.7,19.7,20.5
1984,20.9,21.5,21.3,20.5,18.5,17.5,16.1,15.8,16.4,18.1,20,21.1
1985,21.9,22.4,21.2,21,18.1,16.3,15.8,15.2,16.1,18.1,19.5,20.5
1986,22.3,21.8,21,20.2,18.1,16.3,15.4,15.6,15.6,18.1,19.5,20
1987,20.7,21.1,20.4,19.4,19,16.7,16,16.4,16.6,18.2,19.3,20.6
1988,22,22.3,20.9,21,19.6,18.7,16.4,17,18.1,19.6,21.1,21.2
1989,22.1,22.3,21.3,20.6,18.4,18.3,15.8,16,16.8,18.2,19.8,21
1990,22,21.8,22.5,20.6,19.1,17.8,16.3,16.2,16.2,17.9,19.5,20.9
1991,21.8,22.4,21,19.7,17.4,16.5,15.5,15.4,15.9,17.5,18.5,20.5
1992,21.8,21.9,21.5,20.2,18.1,17.2,15.9,15.6,16.4,16.9,18.9,20
1993,20.7,20.7,21.7,19.1,17.9,16.3,16.5,15.3,15.9,17.5,19.5,20.6
1994,22.6,21.5,21.9,20.2,17.7,16.1,14.7,15.8,14.9,17.1,19.2,19.6
1995,21.4,21.8,22.4,21.3,18.4,16.2,16.1,16,16.8,18.9,20.4,21.6
1996,21.9,22.4,22,21.4,18.5,16.7,15.8,15.5,16.8,18.1,19.3,21.4
1997,21.5,21.6,21.8,19.1,18.9,17,15.1,14.5,15.8,17,19.8,21.6
1998,22.3,22.3,22.2,21.5,19.9,17.9,17,17.6,17.9,18.9,20,21.4
1999,22.4,22.6,22.3,20.8,20,16.3,17.6,15.8,17.5,18.6,19.2,20
2000,21.4,21.8,21.4,20.3,19.9,16.7,15.2,15.8,16.6,18.4,19.9,20.2
2001,21.6,22.1,22.1,20,18.4,16.3,15.7,16,16.7,18.8,20.4,21.5
2002,22.9,22.5,21.7,20.6,18.4,18,15.4,16,16.3,18.5,19.1,20.8
2003,21.6,21.8,22.1,20.3,19.8,17.4,15.7,14.9,15.7,17.9,19.3,21.2
2004,21.9,22.8,22.2,20,18.5,16.9,15.5,14.8,16.4,18.4,19.1,20.5
2005,23,22.2,21,20.4,18.9,16.2,16.1,15.3,16.5,18.1,19.2,20.6
2006,21.9,21.9,21.9,21,18.3,16.5,14.8,15.4,16.1,17.5,19.9,20.2
2007,21.2,21.9,21.6,20,18.4,18.7,15.6,16.9,17.7,18.9,20.2,21.1
2008,22.4,22.5,22.1,20.9,17.1,16.4,16.5,16.4,17.1,18.3,19.9,21.4
2009,21.8,22.7,22.1,20.3,17.5,17,15.8,15.4,16.7,17.5,19.1,21
