Year	Total
1980	17600400000
1981	18700200000
1982	19250100000
1983	19800900000
1984	20625300000
1985	22000500000
1986	22550400000
1987	22935600000
1988	23375700000
1989	28601100000
1990	29992500000
1991	2076570000
1992	2055870000
1993	2932470000
1994	3311550000
1995	3551130000
1996	3387240000