Year	Total
1971	85020000
1972	94020000
1973	116000000
1974	132000000
1975	154000000
1976	176000000
1977	208000000
1978	240000000
1979	276000000
1980	347100000
1981	394100000
1982	437100000
1983	494100000
1984	544100000
1985	568100000
1986	645100000
1987	709100000
1988	808100000
1989	838200000
1990	983200000
1991	1120000000
1992	1283000000
1993	1543000000
1994	1891000000
1995	2185000000
1996	2323000000
1997	2476000000
1998	2564000000
1999	2764000000
2000	2875000000
2001	2908000000
2002	2803000000
2003	2602000000
2004	2664000000
2005	3142000000
2006	3403000000
2007	3353000000
2008	3611000000