Year	Total
1971	6001000
1972	10000000
1973	21000000
1974	42010000
1975	71010000
1976	123000000
1977	188000000
1978	217000000
1979	278100000
1980	379100000
1981	484100000
1982	609100000
1983	747100000
1984	931200000
1985	1154000000
1986	1470000000
1987	1568000000
1988	1745000000
1989	1817000000
1990	2083000000
1991	2190000000
1992	2498000000
1993	2872000000
1994	3082000000
1995	3126000000
1996	3044000000
1997	3247000000
1998	3673000000
1999	3786000000
2000	3967000000
2001	4227000000
2002	4415000000
2003	4634000000
2004	4963000000
2005	4760000000
2006	5790000000
2007	6155000000
2008	7031000000