Year	current US$
1991	482914793.412146
1992	498044688.02223706
1993	489067695.99540854
1994	508327659.64629954
1995	515031988.34127647
1996	509742799.1064646
1997	514863184.42952716
1998	524857501.36449826
1999	548464728.42264
2000	567019654.4021246
2001	584835781.9278532
2002	606415674.0058856
2003	642959470.180789
2004	688601797.1989805
2005	729424209.8570231
2006	791915417.9866195
2007	871804682.6205119
2008	1031814867.1231874
2009	1070790733.7906044
2010	1145970369.286691
2011	1247888544.403869
2012	1417840322.7530792
2013	2051480179.607362
2014	2263292357.121556
2015	2500358047.163813
2016	2640882327.918479
2017	2753515438.8057685
2018	2892833391.1017833
2019	2994853638.568318
2020	3086150981.032067
2021	3326825228.8699703
2022	3742298479.076755
2023	4006530513.5577674