Year	current US$
1970	835.2420318887647
1971	871.4748648725225
1972	934.4619289127307
1973	1059.7877894197848
1974	1266.5484215735507
1975	1517.3726339021614
1976	1718.2934996903607
1977	2006.1507548053635
1978	2070.701044012169
1979	1990.2161671093725
1980	2478.062977471866
1981	2973.075786319301
1982	3118.2102342169946
1983	2905.0170040713533
1984	2496.596250152219
1985	2661.8516524382
1986	2588.5181414845706
1987	1938.1769104907426
1988	2449.039692408093
1989	1572.7989132650546
1990	1768.4709865524703
1991	2034.6551298987838
1992	2249.8552628995362
1993	2137.584468886828
1994	1983.7073833741888
1995	2628.109778744944
1996	2230.335518995557
1997	2733.4578684457006
1998	2925.8750983413975
1999	3077.534012222964
2000	3647.537313741159
2001	3768.254618697898
2002	2678.2481374833546
2003	2349.0976400012114
2004	3208.571343905609
2005	4186.173696559817
2006	5378.31994752676
2007	6978.630388317105
2008	9543.884468321694
2009	9471.572070234593
2010	11060.007771172663
2011	8392.88462978433
2012	9852.575136808033
2013	9259.131448568489
2014	11747.901803068651