Year	current US$
1991	2569832.325
1992	2625698.328
1993	3351955.414
1994	3910614.491
1995	1340782.12290503
1996	1620111.73184357
1997	1843575.41899441
1998	1620111.73184358
1999	608938.547486034
2000	1083798.88268156
2001	1335195.53072626
2002	1329608.93854749
2003	273743.016759777
2004	1458100.55865922
2005	819846.096273242
2006	1036166.00246323
2007	5195530.72625699
2008	6759776.53631285
2009	9050279.32960894
2010	4972067.03910614
2011	5307262.5698324
2012	4860335.19553072
2013	58146742.3052803
2014	58627995.0761846
2015	53640100.5182244
2016	52684335.9800863
2017	56140485.0473226
2018	36920295.448098
2019	34264018.270972
2020	34984040.4172566
2021	35845637.1605112
2022	38279493.4539565
2023	34449857.8412736