Year	Total
1971	4108000000
1972	4310000000
1973	4646000000
1974	5174000000
1975	5822000000
1976	6338000000
1977	6822000000
1978	7577000000
1979	8404000000
1980	9248000000
1981	10440000000
1982	12090000000
1983	13240000000
1984	15510000000
1985	17260000000
1986	19330000000
1987	22120000000
1988	24610000000
1989	29580000000
1990	31990000000
1991	35860000000
1992	39720000000
1993	43350000000
1994	47920000000
1995	51740000000
1996	55280000000
1997	60360000000
1998	64980000000
1999	70530000000
2000	75640000000
2001	79710000000
2002	83370000000
2003	89750000000
2004	95680000000
2005	100100000000
2006	111000000000
2007	120900000000
2008	124600000000