Year	current US$
1983	3727.0480101583757
1984	3787.470679030828
1985	2919.283511305623
1986	3454.2963342861026
1987	3492.69147434324
1988	4005.201258460186
1989	2382.3358617872086
1990	4330.968191287835
1991	5730.7238098842345
1992	6815.329329698251
1993	6957.417498892505
1994	7464.474736881904
1995	7383.7045096006395
1996	7690.157002547828
1997	8176.771195174354
1998	8250.673174143214
1999	7735.322080184856
2000	7666.5178342378285
2001	7168.975872329107
2002	2579.4887693328405
2003	3333.1529038899735
2004	4258.160260608751
2005	5086.627760731341
2006	5890.978001697949
2007	7210.595547558988
2008	8977.50685093365
2009	8184.389889239906
2010	10385.964431955526
2011	12848.73915145678
2012	13082.664325571988
2013	13080.254732336658
2014	12334.79824538929
2015	13789.060424772022
2016	12790.264139613471
2017	14613.035648657093
2018	11795.16274527976
2019	9963.674161716619
2020	8500.837938505336
2021	10650.860460434518
2022	13650.604629452395
2023	13730.514709024681