Year	Total
1971	9230000000
1972	9934000000
1973	10940000000
1974	12020000000
1975	13210000000
1976	14880000000
1977	17140000000
1978	18950000000
1979	21020000000
1980	23270000000
1981	25060000000
1982	27080000000
1983	29740000000
1984	30930000000
1985	32640000000
1986	35760000000
1987	38390000000
1988	40540000000
1989	43740000000
1990	48670000000
1991	51050000000
1992	51870000000
1993	53640000000
1994	55960000000
1995	63590000000
1996	69070000000
1997	74080000000
1998	79390000000
1999	81310000000
2000	83510000000
2001	73780000000
2002	72770000000
2003	76160000000
2004	78590000000
2005	83210000000
2006	85830000000
2007	90900000000
2008	95600000000