Year	current US$
1995	15551.400824621045
1996	16474.738562322244
1997	16610.001323900222
1998	16355.791051333712
1999	15722.47575578529
2000	17005.356066116077
2001	16734.64857659031
2002	15128.812940791142
2003	15551.569686550069
2004	16385.318761203114
2005	17305.26420729816
2006	18552.863673751363
2007	21284.105690416014
2008	24640.182329497045
2009	23010.015176206318
2010	25869.42068036925
2011	28664.638594478485
2012	27194.703453465394
2013	30702.81245483479
2014	32314.15910368441
2015	30461.96240809489
2016	31762.582252484204
2017	34950.81495063455
2018	36072.48439826823
2019	37723.8494525074
2020	37501.008997709956
2021	43494.50200031564