Year	current US$
1990	643750000
1991	394444444.4444445
1992	461562500
1993	236628787.87878788
1994	151510489.5104895
1995	304639917.69547325
1996	460499082.2821885
1997	383275241.25018
1998	254203825.33659494
1999	225158554.24156618
2000	274075176.24672025
2001	274510006.29586434
2002	282700628.69231576
2003	227018963.24498463
2004	320415816.9842721
2005	403928418.5893623
2006	685748725.4967885
2007	1013118759.4725806
2008	1487964650.4327374
2009	1278996407.523494
2010	1313731553.30399
2011	1578754687.4287894
2012	2309228871.572005
2013	2486491046.2246227
2014	2745030021.773936
2015	2315422263.262008
2016	2312308656.1722784
2017	2534427830.892007
2018	2978973659.6227326
2019	3228054183.454269
2020	2070138935.1007204
2021	2450434614.162892
2022	4324972924.962183