Year	current US$
1990	12196380.4370078
1991	12397716.343149
1992	10765537.9796071
1993	10974793.8488326
1994	10515299.9013209
1995	10794248.2963175
1996	10356916.4819257
1997	9746753.22174172
1998	9835621.13581274
1999	10119081.3998157
2000	15585639.98378
2001	15212467.5110049
2002	15013746.1169149
2003	16884972.0104213
2004	18151626.7442494
2005	18676282.1159516
2006	18189358.4123751
2007	21781569.0984633
2008	26273650.7421252
2009	24001075.6585038
2010	23348529.3021818
2011	27642298.9463551
2012	24842774.5331643
2013	25712425.5310381
2014	25662747.9754395
2015	23681731.1245363
2016	25168918.7055608
2017	26890932.5432199
2018	28904813.1659655
2019	26385389.5573783
2020	26377273.8829923
2021	28332110.6394427