Year	US Dollars adjusted for inflation)
1954	1927
1955	2028
1956	2190
1957	2283
1958	2258
1959	2278
1960	2277
1961	2343
1962	2284
1963	2244
1964	2233
1965	2341
1966	2267
1967	2230
1968	1957
1969	2435
1970	2880
1971	3120
1972	3246
1973	3306
1974	3541
1975	3386
1976	3190
1977	2800
1978	2925
1979	3168
1980	3227
1981	3752
1982	3614
1983	3802
1984	3089
1985	3064
1986	2961
1987	2794
1988	3029
1989	3409
1990	3448
1991	3823
1992	3156
1993	3073
1994	3159
1995	2881
1996	3080
1997	3135
1998	3128
1999	3221
2000	3256
2001	3082
2002	2675
2003	2438