Year	Total
1971	131000000
1972	131000000
1973	136000000
1974	179000000
1975	155000000
1976	135000000
1977	147000000
1978	210000000
1979	228000000
1980	228000000
1981	297100000
1982	359100000
1983	463100000
1984	544100000
1985	657100000
1986	743100000
1987	852200000
1988	924200000
1989	1097000000
1990	1223000000
1991	1433000000
1992	1959000000
1993	2312000000
1994	2534000000
1995	2805000000
1996	3542000000
1997	3698000000
1998	3966000000
1999	4444000000
2000	5503000000
2001	6187000000
2002	6775000000
2003	7259000000
2004	8011000000
2005	8531000000
2006	9315000000
2007	9412000000
2008	10460000000