Year	Total
1971	389100000
1972	440100000
1973	517100000
1974	646100000
1975	686100000
1976	308100000
1977	308100000
1978	308100000
1979	330100000
1980	354100000
1981	354100000
1982	378100000
1983	410100000
1984	351100000
1985	422100000
1986	422100000
1987	425100000
1988	428100000
1989	430100000
1990	432100000
1991	435100000
1992	437100000
1993	439100000
1994	441100000
1995	443100000
1996	474100000
1997	664100000
1998	725100000
1999	735100000
2000	795100000
2001	902200000
2002	971200000
2003	1100000000
2004	1234000000
2005	1450000000
2006	1630000000
2007	1828000000
2008	2198000000