Year	current US$
1981	2175082.52126408
1982	2148899.48270616
1983	2679317.94663333
1984	2850490.56603773
1985	2554919.17596899
1986	2949588.23529412
1987	3401512.39322224
1988	4955386.06951209
1989	4810811.73677393
1990	5065186.92768558
1991	5848261.09099953
1992	6472996.18948855
1993	6559318.6416185
1994	9567361.24139941
1995	9928447.76695254
1996	10608622.5633692
1997	10278568.7683652
1998	8325910.53777266
1999	7947899.18814177
2000	7370402.8291917
2001	5892706.72276964
2002	5454591.93045233
2003	5951360.48280574
2004	6826165.2441707
2005	7652014.78615282
2006	8714091.86619544
2007	8883298.56194138
2008	10261535.7744108
2009	9439480.28959104
2010	11098140.9559853
2011	12497583.074068
2012	14197992.7429347
2013	13534972.5977621
2014	12982090.6693152
2015	12936578.040245
2016	12387415.3138528
2017	14024200.7781045
2018	15204315.9859604
2019	16213724.1956072
2020	15415445.2188217
2021	14515584.5296106