Year	current US$
1993	1877.9199909825588
1994	1902.9827742843477
1995	2136.289917885665
1996	2322.105171896126
1997	2412.8374886848515
1998	2356.176028958809
1999	2456.9275322178837
2000	2593.016626378577
2001	2593.167951046987
2002	2565.3913542197974
2003	2749.2061145562056
2004	3148.562922416949
2005	3634.3121041454615
2006	4208.111977556047
2007	4941.956109212483
2008	5876.383377136601
2009	5385.316186164883
2010	6126.97002506903
2011	6591.894452115611
2012	6989.766913890519
2013	6765.904938384074
2014	6747.772013609285
2015	6001.6674630285925
2016	6021.715498805671
2017	6072.787516381304
2018	6128.698722555039
2019	6082.553773577404
2020	5511.541943662409