Year	current US$
1991	350957942.83079463
1992	477508512.076787
1993	712645016.3090918
1994	866658093.4468187
1995	1238075737.0173924
1996	1406611404.670994
1997	1640142903.5401103
1998	2052591726.841726
1999	2350375768.315555
2000	2118739635.1575456
2001	2164510779.4361525
2002	2884245439.4693203
2003	3337976782.752902
2004	2651311333.3333335
2005	2261129505.207297
2006	1701872726.6334991
2007	2196291594.3615255
2008	1988251891.0779436
2009	4043298698.175788
2010	4023880574.129353
2011	3253731343.283582
2012	3426006740.762852
2013	3571305292.2719736
2014	2902604862.3548923
2015	3596713889.087894
2016	3639854152.570481
2017	3638456126.8325043
2018	3278551179.5688224
2019	2590174866.6666665
2020	907643700.7321041
2021	391591864.12590384
2022	1636903182.1011388
2023	8757263002.749685