Year	Total
1971	37010000
1972	39010000
1973	43010000
1974	47010000
1975	52010000
1976	58010000
1977	58010000
1978	60010000
1979	63010000
1980	67010000
1981	43010000
1982	103000000
1983	72010000
1984	147000000
1985	91020000
1986	239000000
1987	173000000
1988	146000000
1989	144000000
1990	141000000
1991	170000000
1992	165000000
1993	143000000
1994	141000000
1995	149000000
1996	163000000
1997	134000000
1998	104000000
1999	67010000
2000	117000000
2001	132000000
2002	142000000
2003	145000000
2004	155000000
2005	179000000
2006	192000000
2007	213000000
2008	220000000