Year	current US$
1979	21424237.01745401
1980	14552897.519770533
1981	11959120.72241601
1982	22519358.41484772
1983	28179799.383848682
1984	21251947.23019284
1985	9847789.120655704
1986	9391205.417023959
1987	17826184.374518618
1988	22801636.562368445
1989	21600559.93862334
1990	24582827.37931281
1991	47835571.6666284
1992	45825056.57210145
2006	4703504.7693066625
2007	14678337.005932922
2008	11828048.6524517
2009	4593722.540680457
2010	22749879.526786093
2011	14217680.256471168
2012	50540204.40910543
2013	51126699.59065139
2014	109745234.29319851
2015	129528437.8296649
2016	83114606.54967809
2017	130532588.63414712
2018	125040829.2760752
2019	115155940.87088801
2020	101409887.8332834
2021	84211511.09777747