Year	Total
1960	713100000
1961	732100000
1962	870200000
1963	989200000
1964	1083000000
1965	1220000000
1966	1363000000
1967	1499000000
1968	1755000000
1969	2041000000
1970	2674000000
1971	3687000000
1972	4318000000
1973	5023000000
1974	5137000000
1975	5529000000
1976	6475000000
1977	6807000000
1978	7383000000
1979	7754000000
1980	8057000000
1981	8431000000
1982	8986000000
1983	9448000000
1984	10410000000
1985	12190000000
1986	12530000000
1987	13790000000
1988	13330000000
1989	13500000000
1990	14600000000
1991	15640000000
1992	15860000000
1993	16320000000
1994	16990000000
1995	16260000000
1996	17240000000
1997	17430000000
1998	18150000000
1999	18450000000
2000	18140000000
2001	19380000000
2002	19950000000
2003	20410000000
2004	20370000000
2005	20580000000
2006	21140000000
2007	21490000000
2008	21170000000