Year	Total
1971	341100000
1972	366100000
1973	396100000
1974	424100000
1975	427100000
1976	447100000
1977	429100000
1978	428100000
1979	432100000
1980	437100000
1981	468100000
1982	469100000
1983	470100000
1984	461100000
1985	453100000
1986	498100000
1987	536100000
1988	698100000
1989	494100000
1990	580100000
1991	599100000
1992	615100000
1993	740100000
1994	821100000
1995	1003000000
1996	1053000000
1997	1127000000
1998	1056000000
1999	1089000000
2000	1143000000
2001	1217000000
2002	1302000000
2003	1378000000
2004	1461000000
2005	1535000000
2006	1659000000
2007	1983000000
2008	2022000000