Year	current US$
1987	0.0024249251912713114
1988	0.002885957704668958
1989	0.0029245331352985723
1990	1561.8492294877135
1991	1323.4351413387374
1992	765.3637016517902
1993	550.0400078804772
1994	519.8575811882879
1995	578.3446098525831
1996	689.0594413847199
1997	807.0322857523524
1998	851.515542450841
1999	673.5377828872752
2000	749.9085349939613
2001	801.9838370792896
2002	853.5261718689393
2003	1010.0315163086844
2004	1305.0474855720777
2005	1642.7835941479732
2006	1996.0201327228401
2007	2635.3665027611623
2008	3324.7537205015014
2009	2822.689396687966
2010	3281.7293093734293
2011	4119.668183071927
2012	4530.695334094308
2013	4712.002293826649
2014	4830.334861702489
2015	4086.6223465964995
2016	4143.4012568631515
2017	4418.752065466785
2018	4804.054604044404
2019	4741.283271587601
2020	4300.85701291207
2021	5083.606954845773
2022	6729.846599302833
2023	8120.36344318242