Year	Total
1971	160000000
1972	179000000
1973	199000000
1974	213000000
1975	235000000
1976	267000000
1977	311100000
1978	375100000
1979	416100000
1980	477100000
1981	579100000
1982	636100000
1983	737100000
1984	821100000
1985	793100000
1986	825100000
1987	852200000
1988	855200000
1989	835200000
1990	854200000
1991	838200000
1992	906200000
1993	936200000
1994	908200000
1995	1006000000
1996	1018000000
1997	1008000000
1998	1098000000
1999	1152000000
2000	1241000000
2001	1285000000
2002	1321000000
2003	1510000000
2004	1452000000
2005	1594000000
2006	1688000000
2007	2299000000
2008	2368000000