Year	current US$
1989	91.10196639009384
1990	82.15701973774914
1991	124.30569456027371
1992	126.01572406936208
1993	166.51186717072463
1994	206.02255870087714
1995	264.35225559126866
1996	306.10666834897364
1997	326.46341204243396
1998	325.47724085742374
1999	330.84884793779963
2000	341.5823410903212
2001	354.925355279629
2002	373.58440809718763
2003	408.1725591618324
2004	438.5655345573248
2005	538.4825176827383
2006	604.5868622252674
2007	707.0774749994293
2008	883.0267278683586
2009	935.1471198779556
2010	1319.4257273445821
2011	1529.1833025921471
2012	1729.8480006135742
2013	1895.2804435934306
2014	2061.7001311278996
2015	2093.610446974836
2016	2224.0701152006213
2017	2404.576438001733
2018	2649.165825902432
2019	2829.3632937562716
2020	2941.226206497409
2021	3037.4566046207215