Year	Total
1971	906200000
1972	851200000
1973	871200000
1974	830100000
1975	870200000
1976	932200000
1977	1000000000
1978	1070000000
1979	1059000000
1980	1164000000
1981	1293000000
1982	1360000000
1983	1399000000
1984	1379000000
1985	1412000000
1986	1451000000
1987	1577000000
1988	1711000000
1989	1557000000
1990	1592000000
1991	1769000000
1992	1907000000
1993	2153000000
1994	2209000000
1995	2317000000
1996	2397000000
1997	2461000000
1998	2593000000
1999	2782000000
2000	2896000000
2001	2892000000
2002	2798000000
2003	2610000000
2004	2627000000
2005	2695000000
2006	2720000000
2007	2918000000
2008	2853000000