1929	758400
1930	475600
1931	263400
1932	554600
1933	585800
1934	287600
1935	651300
1936	387400
1937	615900
1938	552900
1939	555900
1940	312900
1941	312100
1942	575700
1943	666000
1944	517600
1945	739300
1946	629800
1947	603200
1948	527700
1949	645600
1950	809200
1951	752300
1952	689700
1953	435800
1954	298400
1955	441800
1956	422100
1957	551000
1958	627200
1959	423100
1960	557800
1961	565500
1962	654100
1963	378300
1964	370800
1965	521900
1966	445400
1967	487400
1968	566400
1969	606600
1970	549100
1971	534300
1972	540700
1973	932800
1974	829200
1975	745300
1976	492100
1977	364900
1978	650500
1979	793900
1980	548800