Year	Total
1971	462100000
1972	521100000
1973	576100000
1974	559100000
1975	643100000
1976	710100000
1977	779100000
1978	931200000
1979	945200000
1980	1014000000
1981	1093000000
1982	1167000000
1983	1313000000
1984	1336000000
1985	1462000000
1986	1565000000
1987	1729000000
1988	1864000000
1989	1946000000
1990	2392000000
1991	2658000000
1992	2889000000
1993	3125000000
1994	3467000000
1995	3834000000
1996	4164000000
1997	4738000000
1998	5329000000
1999	5345000000
2000	5727000000
2001	5986000000
2002	6349000000
2003	6508000000
2004	6526000000
2005	6751000000
2006	6765000000
2007	6822000000
2008	6750000000