Year	Total
1971	635100000
1972	635100000
1973	635100000
1974	740100000
1975	852200000
1976	943200000
1977	1128000000
1978	1296000000
1979	1706000000
1980	2357000000
1981	2696000000
1982	3224000000
1983	3753000000
1984	4536000000
1985	5077000000
1986	5846000000
1987	6807000000
1988	7901000000
1989	8684000000
1990	9362000000
1991	10410000000
1992	13170000000
1993	14080000000
1994	15580000000
1995	17130000000
1996	17760000000
1997	18750000000
1998	19400000000
1999	21460000000
2000	22770000000
2001	23210000000
2002	23630000000
2003	25850000000
2004	27610000000
2005	30730000000
2006	33340000000
2007	33710000000
2008	32290000000