Year	US Dollars adjusted for inflation)
1960	13827.44964
1961	14075.85942
1962	14142.25529
1963	14592.14466
1964	15227.99427
1965	15552.45814
1966	15783.91884
1967	16061.94575
1968	16620.86985
1969	16891.62203
1970	17934.19142
1971	18481.73121
1972	19211.55651
1973	20422.48907
1974	19906.84234
1975	19613.86382
1976	20189.60565
1977	20689.65702
1978	21557.84974
1979	22344.36838
1980	21865.12808
1981	21688.99634
1982	22132.99825
1983	23059.57022
1984	23547.16468
1985	24479.42543
1986	25185.8304
1987	26465.99501
1988	27925.08124
1989	28568.12654
1990	28691.29287
1991	28291.92196
1992	28321.03453
1993	28967.15505
1994	30014.5814
1995	30674.60555
1996	31373.34119
1997	32556.3167
1998	33480.16601
1999	34442.10709
2000	35576.76685
2001	36341.70975
2002	37077.64835
2003	38132.84109
2004	38813.02169
2005	39740.90292
2006	40418.7473
2007	41050.40593
2008	40536.13486
2009	38545.91582
2010	38893.01849
2011	39150.75602
2012	39455.41214
2013	39996.5019
2014	40908.74586
2015	41536.91912
2016	42039.73636
2017	42514.48745