1929	822.2
1930	751.5
1931	703.6
1932	611.8
1933	603.3
1934	668.3
1935	728.3
1936	822.5
1937	865.8
1938	835.6
1939	903.5
1940	980.7
1941	1148.8
1942	1360
1943	1583.7
1944	1714.1
1945	1693.3
1946	1505.5
1947	1495.1
1948	1560
1949	1550.9
1950	1686.6
1951	1815.1
1952	1887.3
1953	1973.9
1954	1960.5
1955	2099.5
1956	2141.1
1957	2183.9
1958	2162.8
1959	2319
1960	2376.7
1961	2432
1962	2578.9
1963	2690.4
1964	2846.5
1965	3028.5
1966	3227.5
1967	3308.3
1968	3466.1
1969	3571.4
1970	3578
1971	3697.7
1972	3898.4
1973	4123.4
1974	4099
1975	4084.4
1976	4311.7
1977	4511.8
1978	4760.6
1979	4912.1
1980	4900.9
1981	5021
1982	4919.3
1983	5132.3
1984	5505.2
1985	5717.1
1986	5912.4
1987	6113.3
1988	6368.4
1989	6591.8
1990	6707.9
1991	6676.4
1992	6880
1993	7062.6
1994	7347.7
1995	7543.8
1996	7813.2
1997	8159.5
1998	8508.9
1999	8858.963
2000	9191.413
2001	9214.54
2002	9440.2