Year	constant 2015 US$
1993	325.15187822433313
1994	328.72094518618917
1995	346.15835670802693
1996	370.0267547160858
1997	355.4376785961503
1998	384.2671486293194
1999	399.88619207887103
2000	412.1843418866725
2001	414.04136281963525
2002	430.67117206561096
2003	457.28939379284134
2004	505.3486646125977
2005	557.7652523475805
2006	585.2159379292387
2007	610.5277014925547
2008	677.0229172732846
2009	665.7441827148829
2010	713.637865535585
2011	776.5970822829946
2012	800.9293045112751
2013	835.044901127738
2014	860.4268836623355
2015	899.1907468387208
2016	947.1203403324114
2017	977.472012715234
2018	1029.304268515955
2019	1079.3524552199867
2020	1020.9123961619771
2021	989.052313610134
2022	1013.4258393937297
2023	814.221903736267