Year	Total
1971	931200000
1972	990200000
1973	1059000000
1974	1142000000
1975	1258000000
1976	1388000000
1977	1562000000
1978	1874000000
1979	2312000000
1980	2304000000
1981	2805000000
1982	3374000000
1983	4096000000
1984	4499000000
1985	4910000000
1986	5494000000
1987	6206000000
1988	7055000000
1989	7120000000
1990	8593000000
1991	10020000000
1992	11340000000
1993	12810000000
1994	14670000000
1995	18120000000
1996	19550000000
1997	22720000000
1998	24870000000
1999	26890000000
2000	30570000000
2001	33350000000
2002	34000000000
2003	35760000000
2004	40330000000
2005	41190000000
2006	43760000000
2007	47330000000
2008	50190000000