Year	current US$
1995	1677.0161513556357
1996	1854.339194744985
1997	2302.5058387360737
1998	2609.4757400825392
1999	2540.957447680775
2000	2714.049648859852
2001	2951.426236430317
2002	3519.7092670604143
2003	4627.567379224194
2004	5670.270574157903
2005	6739.682155457562
2006	7914.200364248179
2007	10359.426049863088
2008	12654.526642936236
2009	10330.119094544243
2010	10178.364919208809
2011	12036.580423632657
2012	12013.395374029285
2013	13291.952245020928
2014	14168.397866826866
2015	11842.932740994282
2016	12474.14542736157
2017	14132.882993969706
2018	16199.395139379443
2019	16457.09573456452
2020	17108.310663422464
2021	19957.147930238047