Year	current US$
1975	0
1979	0
1980	0
1981	0
1982	0
1983	0
1984	0
1985	0
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	467733.57269877096
1998	551377.8798928064
1999	483143.81802147673
2000	458411.17063316086
2001	470962.01689142536
2002	549187.2319940211
2003	654516.3576129755
2004	737587.034798685
2005	752569.961046175
2006	753679.1388869545
2007	938257.9900759959
2008	1031065.9757719059
2009	957050.1891324386
2010	1195470.9286473757
2011	1399689.6584402986
2012	1514821.6195283683
2013	17541907.776314262
2014	19342294.963140354
2015	-14057570.28846882
2016	1991206.2426205666
2017	2089013.8623205535
2018	2266645.1137942085
2019	2824661.0206659487
2020	8540860.891848821
2021	4551596.7173502175
2022	4124985.945509167
2023	4733173.719922565