1901,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1902,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1903,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1904,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1905,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1906,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1907,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1908,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1909,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1910,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1911,21.5,21.6,21.8,21.1,19.9,18.9,18.2,19,20.2,21.3,21.2,20.9
1912,21.4,21.7,21.8,21.1,19.9,18.8,18.2,18.9,20.2,21.4,21.3,21
1913,21.3,21.6,21.8,21.1,20,18.8,18.5,19.1,20.4,21.5,21.3,21.2
1914,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.3
1915,21.5,21.8,21.9,21.3,20.1,18.8,18.4,19,20.4,21.5,21.3,21.1
1916,21.4,21.9,21.8,21.1,20.1,18.9,18.4,19.1,20.4,21.5,21.4,21.2
1917,21.5,21.9,21.9,21.1,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1918,21.4,21.9,21.9,21.1,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1919,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1920,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1921,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.5,21.6,21.5,21.4
1922,21.7,22,22,21.3,20.2,19,18.5,19.1,20.5,21.6,21.5,21.4
1923,21.5,21.8,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1924,21.6,22,22,21.3,20.2,19,18.8,19.3,20.6,21.7,21.5,21.4
1925,21.6,21.8,21.9,21.2,20.2,19.1,18.8,19.4,20.5,21.5,21.3,21.2
1926,21.5,21.8,21.8,21,20.2,19.1,18.7,19.3,20.5,21.5,21.3,21.1
1927,21.5,21.8,21.9,20.9,19.9,18.7,18.5,19.3,20.6,21.7,21.6,21.3
1928,21.5,21.8,22.1,21.4,20.3,18.9,18.6,19.2,20.6,21.7,21.6,21.3
1929,21.5,22,22.1,21.2,20.2,18.8,18.4,19,20.3,21.5,21.3,21.3
1930,21.6,21.8,21.9,21.2,19.9,18.7,18.3,18.9,20.3,21.4,21.3,21.2
1931,21.5,21.8,21.9,21.2,20.3,19,18.6,19.2,20.5,21.6,21.3,21.3
1932,21.5,22,21.9,21.2,20.1,18.9,18.5,19.1,20.4,21.5,21.3,21.2
1933,21.5,21.8,21.9,21.3,20.2,19,18.5,19.1,20.4,21.6,21.3,21.2
1934,21,21.1,21.4,21.2,20.6,19,18.5,19.3,20.3,21.5,21.4,21.3
1935,21.8,21.7,22.1,20.9,20.1,18.7,18.1,18.7,20.5,22,21.5,21.2
1936,21.3,21.8,21.8,21.1,20.5,18.8,18.2,18.7,20.1,21.9,21.9,21.1
1937,21.6,22,21.9,21.5,20.5,19.1,18.4,19,20.8,21.7,21.9,21.2
1938,21.6,21.8,21.8,21.3,20.1,19.1,18.7,19.2,20.6,21.7,21.5,21.1
1939,21.3,21.8,21.8,21.2,20.5,18.8,18.8,19.5,20.7,21.6,21.5,21.2
1940,21.8,22.2,21.6,20.4,20.7,19.5,18.6,19.5,20.8,21.6,21.8,21.6
1941,21.7,22.7,22.2,21.9,20.9,19.1,18.7,19.4,21,22,21.1,21.1
1942,21.9,22.6,22.2,21.5,20.7,19.4,18.3,19.2,20.4,21.5,21.1,21.4
1943,21.8,21.6,22,21.8,20.8,19,18.6,19,20.2,21.6,22,21.8
1944,20.9,21.8,21.8,21.6,20.5,19.8,18.7,19.4,20.8,21.9,22.1,21.8
1945,22,21.9,22.6,22.3,21,18.5,18.6,19,20.4,21.9,21.8,21.3
1946,21.8,22.1,22.2,21.7,20.9,19.1,18.5,18.8,20.2,21.8,21.7,22.1
1947,22.2,21.9,22.2,21.2,19.9,19.2,18.9,18.8,20.5,21.4,21.8,21.1
1948,21.3,21.6,21.8,21.4,20.9,19,18.4,19,20.1,21.3,20.9,20.9
1949,21.6,21.6,21.8,21.9,20.6,18.8,18.6,19.6,20.3,21.8,22.1,21.3
1950,21.1,20.9,21.9,21.2,19.5,18.3,18.1,18.5,19.7,20.4,20.9,21
1951,22.4,22.5,22.3,20.9,20.1,19.2,18.9,18.8,21.5,21.9,21.9,21.6
1952,22.3,22.7,22.9,22,21,19,18.6,19.4,21.4,21.8,21.4,21.8
1953,22.4,22,22.4,21.9,20.5,20,18.7,19.7,20.9,21.9,22,21.7
1954,22.3,22.7,23,21.5,20.6,18.7,18.6,19.2,20.7,21.7,21.2,21.4
1955,22.1,21.8,21.9,21.1,20,19.3,19.2,19.9,20.7,21.9,21.4,21.5
1956,21,21.6,22.3,21.2,20.3,19.4,18.1,19.7,20.2,21.6,21,21.1
1957,21.9,21,21.7,21.4,20.3,19.1,18.4,19.3,21.2,22.4,21.9,21.7
1958,22.2,21.8,22.3,21.6,20.4,19.2,18.3,19.3,21.2,22,22,21.5
1959,22.4,22.4,22.3,21.5,20.8,19.4,18.6,19.5,20.7,21.8,21.6,21.3
1960,22.2,21.9,21.8,21,20.1,19.5,18.3,19.5,20.3,21.4,22.1,21.8
1961,22.4,22.4,22.5,21.5,21.4,20.2,19.7,19.7,20.5,21.4,20.9,21.8
1962,21.4,21.5,22.3,22.1,19.9,19.3,18.3,19.4,20.5,21.6,20.9,21.2
1963,20.9,21.3,21.5,20.6,19.9,18.3,18.3,18.4,19.9,22.2,21.4,21.1
1964,21.5,22.5,22.3,21.3,20,19.1,17.2,18.6,19.2,20.6,21.4,20.4
1965,21.1,21.8,22,21.1,19.9,18.6,18,18.6,20.6,21,21.3,21.2
1966,22.2,22.6,21.9,20.7,20.4,19.1,19,19.6,20.9,21.5,20.9,21.3
1967,21.6,22.2,22.5,21.4,20.2,18.7,18.4,18.6,20.1,21,21,21.3
1968,20.9,21.1,20.2,20.2,19.3,18.2,17.2,18,19.9,21.4,20.3,21.2
1969,21.5,21.2,21.6,21.9,19.9,18.6,18.4,18.7,20.9,22.2,21.5,21.2
1970,21.8,22,21.9,20.6,19.6,18.5,17.5,18.3,19.9,21.3,21.4,21.1
1971,21.1,21,21,20.7,19.4,17.4,17.6,19,19.4,20.7,21.1,20.8
1972,20.3,20.4,21.4,21.7,20.4,18.8,18.3,19.3,20.5,21.8,21.1,21.2
1973,21.3,22.2,22.3,21.9,20.2,18.6,18.1,19.1,20.5,21.6,21.8,20.8
1974,21.2,21,21.2,20.7,19.3,18.6,18.2,18.7,18.8,21,20.9,20.9
1975,21.4,21.8,22.3,21.3,20,18.9,18.9,18.2,19.8,20.7,20.7,20.6
1976,21.3,22.1,22.2,21,20.1,19.1,18.6,19.2,20.1,21.6,21.7,21.4
1977,21.9,22.3,22.2,21.3,20.5,18.6,18.4,19.1,20.4,21.9,20.4,21
1978,20.7,21.5,20.5,21,19.4,18.7,18.4,19.5,21.1,21.6,21,21.3
1979,21.5,21.5,20.5,21.3,20.4,18.8,18.6,20.4,20.7,20,21.6,22.9
1980,21.6,21.6,22.1,21.8,20.5,18.3,18,18.9,20.9,21.8,21.2,21
1981,22,22.5,22.3,20.7,19.7,18.8,17.5,19.5,20.5,21.3,21.7,21.4
1982,22,22.5,22.4,21.3,20.2,19.5,19.1,19.4,21.3,21.2,21.2,21.5
1983,22.5,22.4,22.5,21.9,20.7,19.8,19.3,19.7,20.3,22.4,22.5,20
1984,19.8,21.3,22,19.8,20.5,19.2,18.3,19,20.7,21.1,20.6,21
1985,21.9,21.6,21.6,20.7,19.8,18.4,18.4,18.8,20.7,21.4,21.3,21.6
1986,21.9,22.2,21.7,21.2,20,18.3,18.1,19.5,20.4,22.1,21.5,21.4
1987,21.8,22.2,23.3,22.7,20.8,19.2,19.1,19.8,21.9,22.5,22.5,22.4
1988,22.8,23.1,22.8,21.6,20.3,20.6,19.1,19.5,20.8,21.8,21.3,21.2
1989,21.4,20.9,21.9,20.5,19.9,18.7,18.4,19.1,20.7,21.5,21.3,20.9
1990,21.3,22.4,21.8,21.2,20.4,18.9,18.6,19.1,20.1,21.9,21.6,21.4
1991,21.6,22.2,22.6,21.4,20.6,19.8,18.5,18.9,20.5,21.8,21.4,21.1
1992,21.9,22.8,22.8,21.8,20.3,19.6,18.8,18.6,20.9,21.8,21.2,21.2
1993,20.7,20.5,21.3,21.8,21,19.6,18.4,19.6,20.5,22,22.8,21.7
1994,20,22,20.3,21.1,20.5,19.3,18.8,19.7,21,22.1,21.5,21.4
1995,21.7,22.1,21.8,21.8,20.7,20,18.9,19.8,21,22.4,22.5,22.2
1996,22.5,23.2,22.7,21.5,20.7,19.5,19.1,19.6,21.1,22.1,21.7,21.8
1997,22.9,22.8,21.4,21.8,21,20,19.3,19.6,22,22.2,21.9,22.3
1998,22.4,22.9,22.7,20.6,19.8,19.6,19.4,19.3,20.6,23,23.1,22.2
1999,23.1,22.4,22.6,22.2,20.2,20.9,19.1,20.8,22.2,21.8,21.9,21.5
2000,21.2,21.8,23.1,23.2,22.2,19.4,20.1,21.3,20.9,21.7,22.9,21.2
2001,22.1,23.9,23.5,21.1,20.1,19.2,18.5,20.3,21.5,22.5,21.4,21.7
2002,22,22.7,23.5,22.6,21.5,20.2,19.7,20.5,22.4,23.5,21.9,22.7
2003,22.5,22.6,23.2,22.5,21.4,20.5,19.2,19.8,21.3,23.2,23.3,23.8
2004,24,23.9,23,21.3,21.2,19.6,19.7,20.5,21,21.5,21.5,21.2
2005,21.4,23.6,23.2,22.4,20.6,20,18.7,19.5,21.4,21.8,22.7,23.3
2006,22.8,23.1,22.8,21.7,21.8,18.8,19.8,20.1,20.6,22.8,23.2,21.9
2007,22.9,23.9,23.3,22.1,21.3,18.8,18.4,19.4,22.6,21.7,21.6,22.4
2008,23,24.1,21.9,21.8,20.8,19,18.8,20.7,21.1,21.8,21.1,21.1
2009,22,24,23,22.2,20.8,19.9,19.1,21,22,23.3,22.1,23.6
