Year	US Dollars adjusted for inflation)
1950	1302
1951	1264
1952	1298
1953	1325
1954	1336
1955	1291
1956	1282
1957	1243
1958	1271
1959	1319
1960	1313
1961	1529
1962	1717
1963	1918
1964	2051
1965	2001
1966	1955
1967	2069
1968	2246
1969	2317
1970	2286
1971	2358
1972	2420
1973	2460
1974	2491
1975	2565
1976	2760
1977	2806
1978	2972
1979	3074
1980	3092
1981	3046
1982	3247
1983	3175
1984	3219
1985	3279
1986	3531
1987	3362
1988	3608
1989	3606
1990	3636
1991	3826
1992	3587
1993	3503
1994	3825
1995	3485
1996	3831
1997	3643
1998	3825
1999	3749
2000	3720
2001	3893
2002	3952
2003	4060