Year	Total
1971	189000000
1972	190000000
1973	195000000
1974	210000000
1975	224000000
1976	239000000
1977	258000000
1978	289100000
1979	327100000
1980	359100000
1981	396100000
1982	398100000
1983	424100000
1984	466100000
1985	504100000
1986	557100000
1987	616100000
1988	666100000
1989	698100000
1990	722100000
1991	755100000
1992	802100000
1993	857200000
1994	951200000
1995	1036000000
1996	1083000000
1997	1171000000
1998	1251000000
1999	1321000000
2000	1390000000
2001	1401000000
2002	1447000000
2003	1487000000
2004	1550000000
2005	1646000000
2006	1744000000
2007	1833000000
2008	1970000000