Year	US Dollars adjusted for inflation)
1960	1298
1961	1320
1962	1365
1963	1488
1964	1638
1965	1519
1966	1638
1967	1652
1968	1801
1969	1853
1970	1913
1971	2016
1972	2011
1973	1964
1974	1892
1975	2066
1976	2171
1977	2153
1978	2321
1979	2358
1980	2065
1981	2064
1982	2319
1983	2195
1984	2176
1985	2222
1986	2337
1987	2302
1988	2278
1989	2574
1990	2353
1991	2210
1992	2183
1993	2082
1994	1955
1995	2007
1996	2067
1997	2086
1998	2133
1999	2175
2000	2172
2001	2109
2002	2060
2003	2019