1950	2,555,982,611 	
1951 	2,593,750,848 	
1952 	2,635,793,710 	
1953 	2,681,114,693 	
1954 	2,728,957,573 	
1955 	2,780,296,616 	
1956 	2,833,150,774 	
1957 	2,888,869,547 	
1958 	2,945,263,533 	
1959 	2,997,482,465 	
1960 	3,039,433,944 	
1961 	3,080,063,747 	
1962 	3,136,082,730 	
1963 	3,205,488,224 	
1964 	3,276,491,201 	
1965 	3,345,409,879 	
1966 	3,415,545,874 	
1967 	3,485,194,887 	
1968 	3,556,946,153 	
1969 	3,631,478,167 	
1970 	3,706,601,448 	
1971 	3,783,996,830 	
1972 	3,860,789,944 	
1973 	3,937,179,217 	
1974 	4,012,904,290 	
1975	4,086,387,665 	
1976 	4,158,437,090 	
1977 	4,230,768,221 	
1978 	4,303,037,183 	
1979 	4,378,225,681 	
1980 	4,453,863,820 	
1981 	4,529,899,224 	
1982 	4,610,062,597 	
1983 	4,690,307,356 	
1984 	4,769,630,537 	
1985 	4,850,224,998 	
1986 	4,932,580,072 	
1987 	5,018,293,296 	
1988 	5,104,636,805 	
1989 	5,190,697,978 	
1990 	5,277,725,410 	
1991 	5,360,628,665 	
1992 	5,443,740,826 	
1993 	5,525,753,998 	
1994 	5,606,338,688 	
1995 	5,687,011,326 	
1996 	5,766,435,620 	
1997 	5,846,871,429 	
1998 	5,925,770,871 	
1999 	6,003,771,994 	
2000 	6,081,002,937 	
2001 	6,157,756,751 	
2002 	6,234,277,496 	
2003 	6,310,549,064 	
2004 	6,386,542,886 	
2005 	6,462,181,426 	
2006 	6,537,660,423 	
2007 	6,613,222,370 	
2008 	6,688,888,440 	
2009 	6,764,650,308 	
2010 	6,840,423,256 	
2011 	6,916,178,298