Year	Total
1971	136000000
1972	148000000
1973	163000000
1974	179000000
1975	195000000
1976	221000000
1977	266000000
1978	289100000
1979	345100000
1980	211000000
1981	240000000
1982	264000000
1983	282100000
1984	291100000
1985	330100000
1986	340100000
1987	372100000
1988	405100000
1989	436100000
1990	502100000
1991	540100000
1992	562100000
1993	630100000
1994	609100000
1995	784100000
1996	868200000
1997	984200000
1998	1108000000
1999	1174000000
2000	1330000000
2001	1429000000
2002	1497000000
2003	1540000000
2004	1658000000
2005	1763000000
2006	1807000000
2007	2063000000
2008	2129000000