Year	US Dollars adjusted for inflation)
1980	403.65773
1981	447.53842
1982	451.36077
1983	490.1359
1984	498.7035
1985	504.73655
1986	545.52569
1987	677.5412
1988	688.17998
1989	721.22642
1990	789.21733
1991	785.99245
1992	831.06305
1993	861.19392
1994	915.4099
1995	983.26248
1996	1029.17766
1997	1065.05677
1998	1100.16152
1999	1155.20976
2000	1201.10579
2001	1263.96777
2002	1360.79225
2003	1425.05517
2004	1469.37315
2005	1534.82075
2006	1601.9158
2007	1848.56626
2008	1898.05279
2009	1986.13562
2010	2178.92138
2011	2310.00366
2012	2387.00567
2013	2399.91892
2014	2500.26015
2015	2628.18961
2016	2801.27524
2017	2955.81111