Year	Total
1971	96020000
1972	87020000
1973	85020000
1974	87020000
1975	89020000
1976	94020000
1977	98020000
1978	111000000
1979	126000000
1980	151000000
1981	157000000
1982	170000000
1983	181000000
1984	196000000
1985	216000000
1986	217000000
1987	200000000
1988	256000000
1989	261000000
1990	309100000
1991	365100000
1992	405100000
1993	437100000
1994	481100000
1995	530100000
1996	558100000
1997	569100000
1998	516100000
1999	497100000
2000	520100000
2001	395100000
2002	591100000
2003	644100000
2004	711100000
2005	769100000
2006	977200000
2007	1117000000
2008	1178000000