Year	current US$
1990	1721.1225059088276
1991	1917.6381760541587
1992	2089.5014862435805
1993	1917.5124605145663
1994	2123.9335748043923
1995	2281.0115558144353
1996	2185.6934332561
1997	2202.664257212442
1998	2017.4031948838533
1999	1898.8162269619638
2000	1922.9984325792557
2001	1690.7182268551478
2002	1588.6517624626204
2003	2359.8756100755554
2004	3021.287236910358
2005	3152.1529710176655
2006	3448.2920777145746
2007	3610.0995092451026
2008	3565.6413681902936
2009	3636.2934648209434
2010	4473.430254349196
2011	4864.086358443072
2012	5048.328753483139
2013	4791.059213072927
2014	4828.373270121502
2015	4333.821435583575
2016	3913.297906037432
2017	4647.17262322724
2018	4817.466042983813
2019	4366.481517094314
2020	3655.7848216575803
2021	4018.926054549037