Year	current US$
1983	5477266.21098344
1986	6493743.55644311
1987	6745419.71802632
1988	7206246.22593826
1989	7829183.58731881
1990	8528321.86343252
1991	9655102.11242294
1992	10402875.9815516
1993	11598876.4035721
1994	11732992.4324484
1995	14868723.8793072
1996	14299335.5772639
1997	13247607.615758
1998	14234658.6526279
1999	14524826.4498411
2000	15255749.0903556
2001	15837060.0315821
2002	15540220.9167964
2003	15633304.1672592
2004	15368758.0395692
2005	14824310.0588834
2006	14681511.1351165
2007	14852066.4703772
2008	14802996.5931884
2009	16566340.5589877
2010	19198044.4343963
2011	20417381.8993362
2012	21302441.2874395
2013	20468116.4089274
2014	19120722.9570114
2015	19712901.1740979
2016	21170097.0362129
2017	22968012.4537816
2018	24535467.1193945
2019	26007207.1014506
2020	28014757.8815746
2021	27487260.019848