1901,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1902,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1903,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1904,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1905,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1906,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1907,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1908,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1909,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1910,21.7,21.5,21.6,21.3,21.6,21,20.5,21.1,21.3,21.7,22.7,22.1
1911,21.6,21.4,21.2,21.3,21.7,21.4,20.8,21.4,21.6,22,23.1,22.6
1912,22,21.9,21.9,22,21.8,21.1,20.6,21.2,21.8,22.2,22.8,22.5
1913,21.9,21.5,21.6,21.6,21.9,21.3,20.9,21.6,21.9,22.6,23.5,22.6
1914,22,21.7,21.6,21.6,21.7,21.2,20.8,21.5,21.8,22.2,23,22.7
1915,22,22.1,21.7,21.9,22.1,21.4,20.9,21.5,21.7,22.1,22.9,22.5
1916,21.7,21.7,21.6,21.8,21.9,21.1,20.6,21.2,21.8,22,22.8,22.5
1917,21.8,21.7,21.7,21.7,22,21.6,20.8,21.3,21.7,21.9,23.1,22.2
1918,21.6,21.4,21.6,21.6,21.5,21.9,21.3,21.8,21.9,22.1,23,22.4
1919,21.9,21.8,21.5,21.8,22.2,21.1,20.5,21.2,21.7,21.9,22.9,22.3
1920,21.7,21.5,21.6,21.4,21.6,21,20.2,21.2,21.6,22,22.8,22
1921,21.5,21.3,21.3,21.3,21.9,20.9,20.2,21.2,21.5,21.9,22.9,22.3
1922,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1923,21.6,21.5,21.5,21.5,21.8,21.5,20.6,21.5,21.9,22.1,23.1,22.4
1924,21.9,21.5,21.6,21.7,22.1,21.4,20.8,21.5,21.7,22.1,23,22.4
1925,21.5,21.2,21.2,21.5,22,21.4,20.9,21.4,21.9,22.3,23,22.5
1926,21.8,21.6,21.6,21.8,22.1,21.6,20.9,21.5,21.9,22.2,23.1,22.4
1927,21.6,21.4,21.5,21.6,22,21.5,20.8,21.5,21.9,22.1,23.2,22.6
1928,21.7,21.6,21.4,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.4
1929,21.8,21.5,21.4,21.6,22,21.4,20.8,21.5,21.9,22.2,23.1,22.6
1930,21.7,21.5,21.6,21.6,21.9,21.5,20.9,21.4,21.9,22.2,23.2,22.6
1931,21.8,21.6,21.6,21.8,22.1,21.6,20.8,21.5,21.9,22.3,23.1,22.5
1932,21.7,21.5,21.4,21.8,21.9,21.5,20.8,21.5,21.9,22.1,23.1,22.5
1933,21.8,21.5,21.5,21.6,22,21.4,21,21.4,22,22.1,23,22.3
1934,21.6,21.4,21.3,21.6,21.9,21.5,20.8,21.5,22,22.1,23,22.5
1935,21.7,21.3,21.5,21.6,21.9,21.5,20.9,21.5,21.8,22.2,23.1,22.6
1936,21.7,21.6,21.6,21.7,22.1,21.5,20.8,21.4,22,22.2,23.2,22.5
1937,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1938,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1939,21.7,21.5,21.4,21.5,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1940,21.7,21.5,21.5,21.6,22,21.5,20.9,21.5,21.9,22.2,23.1,22.5
1941,21.6,21.5,21.6,21.6,22,21.4,21.1,21.5,21.8,22.7,23.7,23
1942,21.7,21.3,21.5,21.6,21.9,21.3,21.1,21.4,21.8,22.3,23.4,22.4
1943,24.1,21.6,24.4,23.5,21.9,21.5,21.7,21.6,22.4,23.8,23.4,24.2
1944,23.4,23.1,22.4,22.9,23.2,22.4,23.8,23.3,24.1,23.4,24.1,23.6
1945,23.2,23.1,22.7,21.5,21.8,21.9,21.3,22.7,23.8,23.6,24.8,23.1
1946,21.5,22.4,22.5,22.7,22.6,22.3,21.3,22.2,22.7,23.1,24.1,22.6
1947,21.6,21.5,21.6,21.4,21.9,21.4,20.8,21.5,22,22,23.1,22.4
1948,22,22,21.4,21.4,23.3,22.1,20.8,21.6,22.5,22.2,23.4,22.3
1949,21.7,22.1,22.5,21.6,21.9,21.1,20.1,21.1,21,21.3,22.9,21.6
1950,21.5,20.8,20.8,20.9,21.2,20.2,19.9,20.9,21.5,21.6,22.7,21.9
1951,20.5,20.6,20.7,20.8,22,22.3,21.7,21.9,22,22.3,23.1,22.3
1952,21.5,21.1,21.3,20.9,21.8,20.5,19.9,20.7,21.1,21.6,22.6,22
1953,21.4,20.9,20.8,21.6,22.4,21.6,20.5,21.9,22,21.4,23.1,21.4
1954,21.6,21,21,21.3,20.9,20.5,20,20.7,21.2,21.2,22.5,21.7
1955,20.8,21.2,20.6,20.6,21.2,20.7,20.1,20.4,21,21.4,22.7,21.7
1956,20.7,21.1,20.7,20.8,21.1,20.6,20.2,20.9,21.3,21.3,22.3,21.7
1957,21,20.6,21,21.3,23,22.6,22,22.3,22.5,22.7,23.9,22.9
1958,22,21.4,21.1,21.4,21.8,21.3,20.8,21,21.4,21.8,22.7,22.1
1959,21.5,21.5,21.3,21.8,22.1,20.6,20.8,21.5,21.8,22.1,22.6,21.7
1960,21.1,20.8,20.7,21.5,21.4,20.4,20.5,21.4,21.9,21.7,22.7,22.2
1961,21.2,20.8,21.1,21.1,23,21.2,20.6,21.6,22.2,22.4,22.9,22.7
1962,21.7,21.6,20.7,21.3,21.7,20.1,21.1,21.7,22.6,22.6,23.5,22.8
1963,21.5,20.7,20.5,20.9,22.4,21.9,21,22.2,22.5,22.9,23.4,23.2
1964,22.7,21.8,21.1,21,21.8,20.6,20.4,20.8,21.2,21.8,23,21.5
1965,21.2,21.5,20.8,20.8,22.1,21.6,21.2,21.6,22,22.6,22.9,22.7
1966,22.1,22,21.4,21.6,22,21,20.9,21.4,21.8,21.9,22.6,21.5
1967,21.2,20.5,20.8,21.6,21.6,19.7,20,20.8,20.7,21.6,21.9,21.8
1968,21,20.7,20.7,21.4,20.4,20.1,20.1,21.7,21.6,21.9,23.1,22.5
1969,21.7,21.9,21.9,21.9,23,22.2,21.3,21.2,22.1,22.1,23.1,22.5
1970,21.6,21.2,21.9,22,21.4,21.1,20.5,20.4,21.4,22.1,22.4,22.1
1971,21.2,20.4,20.1,20.9,20.5,20.6,20.1,20.6,21.2,21.2,22.1,21.9
1972,21.6,21.3,20.9,21.2,21.7,22,22.3,22.4,22.3,23,23.6,23.3
1973,21.9,21.6,21.5,21.3,21.5,20.7,19.9,20.5,20.8,21.3,22.2,20.9
1974,20.8,20.5,20.9,21.4,21.8,20.9,19.7,20,19.8,21.1,22.4,22
1975,20.5,20.4,21.1,21.7,21,20.7,19.1,20.5,20.7,21.6,21.6,20.8
1976,20.2,20.2,20.5,20.9,21.7,21.7,21.5,22.2,21.7,21.6,23,22.4
1977,21.7,21.1,21.7,21.5,21.8,21.2,21.3,21.6,22,22.7,23.9,23.4
1978,22.3,22.6,21.4,20.9,21.9,21.4,21,21.4,22.2,22.3,24,22.6
1979,21.8,21.7,21.6,22,22,21.9,21.4,21.6,21.8,22.5,23,22.3
1980,21.6,20.7,21.8,22.3,22.1,21.8,21,21.2,21.6,21.7,22.5,21.8
1981,21.7,21.7,22.4,22.4,22.1,21.4,20.7,21.1,22.3,22.6,22.6,23
1982,22.4,22.3,22.5,22.1,22.6,22.5,22.1,21.9,22.6,23.7,23.9,24.1
1983,23,23,22.7,22.7,23.7,23.4,22.8,22.4,22.6,22.4,24,22.5
1984,21.1,21,21.8,21.7,21.3,21.7,20.4,22.1,22.1,23.2,22.6,23.1
1985,20.9,21.5,22,22.1,21.2,21.7,20,20.9,21.7,21.8,22.2,21.9
1986,21.9,21.5,21.7,22.2,21.9,21,20.5,22.1,22.3,22,23,23.2
1987,22.9,23,22.4,22.6,22.4,22.8,22,22.5,23,22.5,24.2,23.8
1988,22.5,21.9,22.3,21.7,22.4,21.6,20.3,21.1,21.8,21.6,22.8,21.5
1989,21.1,20.8,21.9,22,21.3,21.2,20,21.7,21.8,22.3,23.5,22.3
1990,22.3,21.4,21.8,22.1,22.1,21.8,21.1,21.4,22.9,22.4,24.5,23.3
1991,21.3,21.7,21.7,22.1,22.4,22.4,20.7,20.3,21.7,22.6,23.3,22.7
1992,22.4,21.6,21.6,22.3,22.8,22.2,20.2,21.2,21.8,22.7,23.1,22.1
1993,21.2,20.9,21.2,21.7,22.3,22.2,21.5,21.8,22,22.4,22.9,22.5
1994,21.2,21.1,21.2,21.4,22.1,21.4,20.8,20.8,22.1,22.4,23.2,22.7
1995,22.3,21.6,21.4,21.2,22,22.5,21.6,22,21.8,22.3,22.8,21.5
1996,20.5,20.6,21.7,21.5,21.6,20.4,20.3,21.2,22.1,21.6,23.1,21.9
1997,20.9,21.1,21.7,22.2,23.4,23.1,22.6,23.1,23.3,23.5,24.3,24.1
1998,23.3,22.6,23,23.3,23.3,22.6,21.5,22.8,22.4,22.4,23.6,22.3
1999,21,20.9,21.6,21.6,21.2,21.6,20.4,21.3,21.5,22.1,23,21.8
2000,20.9,20.4,20.5,20.5,22,21.6,21.3,21.9,21.9,22.8,23.5,22.5
2001,23,22.7,20.7,21.1,20.6,19.5,20.2,20.9,20.8,21.2,22.4,21.8
2002,21.1,21.3,21.7,22.2,22.6,20.6,20.3,21.1,21.6,22.1,23.9,22.8
2003,21.9,21.5,21.8,20.9,21.4,20.7,20.5,21.2,21.8,22.5,23,22.2
2004,21.3,21.6,21.6,21,20.6,19.7,20,20.5,21.3,22.9,22.9,23.4
2005,21.7,21.1,20.5,21.2,21.1,20.3,20.3,20.8,20.6,21,21.2,20.5
2006,21.3,20.4,21.1,20.5,21,21.6,20.8,21.3,21.9,22.3,23.2,22.3
2007,22.1,21.7,21.1,21.4,20.9,19.4,19.9,19.9,20.3,20.3,21.8,20.9
2008,21.1,20.8,21.1,20.8,20.7,20.5,21,21.5,21.9,21.8,22.4,21.7
2009,21.3,21.3,20.8,22.5,22.2,22.2,22.2,22.3,22.6,22.8,23.5,22.9
