Year	Total
1971	172000000
1972	173000000
1973	202000000
1974	245000000
1975	206000000
1976	234000000
1977	223000000
1978	243000000
1979	152000000
1980	156000000
1981	158000000
1982	216000000
1983	170000000
1984	133000000
1985	150000000
1986	176000000
1987	181000000
1988	181000000
1989	203000000
1990	222000000
1991	258000000
1992	252000000
1993	285100000
1994	260000000
1995	272000000
1996	258000000
1997	304100000
1998	337100000
1999	379100000
2000	392100000
2001	442100000
2002	414100000
2003	412100000
2004	448100000
2005	533100000
2006	577100000
2007	576100000
2008	634100000