Year	current US$
1988	1640000.013634562
1989	4039999.939501281
1990	11159999.741241332
1991	23790000.05312264
1992	33270000.269636504
1993	90610001.04248518
1994	64789999.771863244
1995	79790000.78886749
1996	117770000.41306017
1997	102810001.50367628
1998	93899998.45065181
1999	135109999.0438669
2000	124590000.48600142
2001	161710001.94363296
2002	208929999.19131407
2003	232529999.7311085
2004	307180002.0188092
2005	435419992.78031313
2006	329990000.1883508
2007	429769995.36342925
2008	445980000.4921853
2009	473299995.2007084
2010	796980002.8633325
2011	841580000.8736551
2012	1002880010.1894888
2013	1123440003.8290768
2014	1169909992.3092878
2015	1223230001.9524984
2016	1253990001.3413286
2017	1312229998.9685411
2018	1473959995.1896813
2019	1634709991.4308639
2020	1489500012.610108
2021	1886259992.9366252
2022	1883029993.325472