Year	Total
1971	154000000
1972	178000000
1973	197000000
1974	177000000
1975	136000000
1976	140000000
1977	157000000
1978	172000000
1979	175000000
1980	183000000
1981	192000000
1982	206000000
1983	228000000
1984	234000000
1985	254000000
1986	270000000
1987	312100000
1988	362100000
1989	407100000
1990	449100000
1991	472100000
1992	587100000
1993	651100000
1994	675100000
1995	759100000
1996	824100000
1997	834200000
1998	904200000
1999	952200000
2000	1055000000
2001	1042000000
2002	1157000000
2003	1295000000
2004	1316000000
2005	1433000000
2006	1500000000
2007	1608000000
2008	1683000000