Year	current US$
1994	393.61073088763885
1995	494.06096193667696
1996	485.6507249931106
1997	550.7257877027334
1998	542.5568856003024
1999	577.3843008677072
2000	648.2668179340722
2001	642.2771098847217
2002	628.5349009146529
2003	629.4376646617609
2004	783.9801036180719
2005	950.2051699844229
2006	1191.2855744226067
2007	1436.5414116345216
2008	1789.372155219247
2009	1646.404253111079
2010	1860.4810571563826
2011	1633.747877350271
2012	1831.16169149026
2013	1867.8265989910196
2014	1952.5336134538602
2015	1602.7746058843263
2016	1478.9659127498367
2017	1511.5713642941446
2018	1525.6699300457365
2019	1562.9598958865088
2020	1443.8546883759104
2021	1440.7376946839395