Year	US Dollars adjusted for inflation)
1950	10980
1951	10220
1952	10810
1953	11110
1954	10910
1955	11330
1956	11840
1957	12480
1958	12510
1959	12480
1960	12890
1961	13290
1962	13360
1963	13420
1964	14540
1965	14590
1966	14590
1967	14450
1968	15080
1969	16670
1970	16820
1971	17100
1972	18010
1973	19290
1974	19940
1975	18450
1976	18790
1977	19070
1978	19760
1979	20280
1980	20380
1981	20240
1982	20420
1983	21030
1984	22330
1985	22960
1986	25160
1987	26040
1988	28190
1989	30730
1990	32030
1991	34510
1992	34590
1993	35490
1994	36420
1995	36330
1996	36960
1997	39690
1998	42080
1999	44770
2000	48220
2001	48220
2002	48590
2003	49260
2004	50750