Year	current US$
1993	1850.7544786081007
1994	2202.40829401489
1995	2849.0464118970267
1996	3029.2401760189614
1997	2996.867625461992
1998	3310.65351948466
1999	3195.8879817942384
2000	3170.934798860819
2001	3504.0121115503225
2002	3971.3518014750634
2003	4732.659946826831
2004	5674.781434642205
2005	6718.502656444007
2006	7570.6609699237915
2007	9564.106191623687
2008	11813.600917639722
2009	9929.14991621844
2010	10077.571840840907
2011	11084.175381612227
2012	10466.927801643906
2013	10987.693706028527
2014	11392.116112352094
2015	10092.211052742145
2016	10297.555973638835
2017	11524.24302444227
2018	13045.51890925119
2019	13299.290977622846
2020	13257.005509070486
2021	15204.312787744793