Year	current US$
1990	1820000.01333654
1991	2549999.99143183
1992	4529999.999329451
1993	6179999.9438226195
1994	7569999.95931983
1995	11819999.9444187
1996	14520000.0796467
1997	16520000.025630001
1998	21310000.192374002
1999	29220000.5725026
2000	27189999.7945875
2001	24989999.927580398
2002	30940000.1652539
2003	31959999.537095398
2004	35180000.288412005
2005	35230000.4549325
2006	41960000.384599
2007	48470000.5557388
2008	50999999.8733401
2009	57779999.2952496
2010	56219999.8330325
2011	46659999.6238947
2012	47580000.3483891
2013	37599999.813363
2014	35570000.667125
2015	24020000.083372
2016	31990000.3951043
2017	30890000.0192225
2018	32529999.680817097
2019	25210000.3510714
2020	17499999.8547137
2021	22209999.691695
2022	21170000.139623884