Year	Total
1971	222000000
1972	246000000
1973	203000000
1974	260000000
1975	291100000
1976	329100000
1977	370100000
1978	384100000
1979	324100000
1980	377100000
1981	387100000
1982	403100000
1983	432100000
1984	445100000
1985	380100000
1986	376100000
1987	499100000
1988	490100000
1989	311100000
1990	369100000
1991	402100000
1992	433100000
1993	440100000
1994	401100000
1995	410100000
1996	421100000
1997	459100000
1998	450100000
1999	460100000
2000	448100000
2001	452100000
2002	470100000
2003	515100000
2004	541100000
2005	603100000
2006	643100000
2007	689100000
2008	733100000