Year	current US$
1990	369950297.18365
1991	315107636.324288
1992	272205523.557851
1993	244123429.143033
1994	207061717.354007
1995	185585894.473665
1996	165539944.504164
1997	158607442.518288
1998	148080646.398235
1999	130469905.179543
2000	124548411.541133
2001	136236023.228793
2002	144696827.213048
2003	163270099.574985
2004	171645755.709067
2005	190317901.292533
2006	195699835.342406
2007	209631448.635557
2008	218727568.150586
2009	210997520.475183
2010	237199418.982277
2011	248768752.679146
2012	252910205.784838
2013	232096266.28932
2014	259601537.422286
2015	278878023.925634
2016	292320064.196844
2017	301581783.836496
2018	334586486.297819
2019	361301224.075868
2020	335884781.86755
2021	396238652.866585