Year	constant 2015 US$
1980	20090803.970716853
1981	18740160.245150376
1982	15033387.034844173
1983	14230256.289175887
1984	14693685.678987563
1985	18588986.239374552
1986	19906240.19926882
1987	26544622.08540527
1988	28653284.48354931
1989	27854817.790100854
1990	24665638.679995835
1991	22914105.726323146
1992	21832422.883720066
1993	27960665.042999048
1994	31091715.272421405
1995	38409824.85869647
1996	39137097.53840427
1997	40982865.19989487
1998	42577560.50885956
1999	61215980.4408067
2000	67083606.62048605
2001	61535195.39743819
2002	59509905.92267737
2003	60688994.132294334
2004	64372542.39025588
2005	61932604.706669345
2006	62108733.67750493
2007	81769681.05691347
2008	80521782.1389867
2009	93384277.21800683
2010	90891441.57910694
2011	89911874.03692125
2012	100301638.98639174
2013	101458080.07337554
2014	102545949.9231348
2015	112135887.48497345
2016	119723468.45009707
2017	104747782.91531578
2018	90802005.92500417
2019	90378674.13671209
2020	102864737.7091868
2021	95701310.5541492
2022	82923479.57396668
2023	77034460.97699094