Year	current US$
1981	500000
1982	600000.0238
1983	600000.0238
1984	699999.9881
1985	699999.9881
1986	800000.0119
1987	800000.0119
1994	7100000
1995	35500000
1996	46020000
1997	67180000
1998	92950000
1999	122453548.571892
2000	142395232.108232
2001	140491791.450902
2002	147801110.668911
2003	192016734
2004	191548234.4
2005	209029050
2006	246343429.361726
2007	271414281.377367
2008	268618171.99
2009	238598200
2010	259382912
2011	290543358.308025
2012	346035432.757602
2013	402604637.039986
2014	419222829.171868
2015	407784045.230191
2016	416129213.480398
2017	468504811.363687
2018	506693451.581134
2019	528443216.045356
2020	490881074.901057
2021	541463307.521034
2022	566181674.696706