Year	US Dollars adjusted for inflation)
1950	1372
1951	1394
1952	1550
1953	1601
1954	1709
1955	1721
1956	1895
1957	1817
1958	1901
1959	2017
1960	2037
1961	2080
1962	2137
1963	2237
1964	2226
1965	2286
1966	2311
1967	2308
1968	2330
1969	2360
1970	2427
1971	2493
1972	2592
1973	2772
1974	2745
1975	2867
1976	3043
1977	3135
1978	3160
1979	3153
1980	3293
1981	3382
1982	3313
1983	3331
1984	3201
1985	2928
1986	3028
1987	2973
1988	3086
1989	3165
1990	3209
1991	3187
1992	3167
1993	3156
1994	3290
1995	3274
1996	3340
1997	3515
1998	3317
1999	3458
2000	3826
2001	3644
2002	3617
2003	3576
2004	3938