Year	constant 2015 US$
1995	24375.162340235867
1996	25903.960957232095
1997	28002.329726129436
1998	30275.410409165284
1999	32099.054814561245
2000	34885.596788663985
2001	35842.69423030021
2002	36616.72065584461
2003	37983.4599295789
2004	38616.04745898111
2005	40335.53179896405
2006	41601.24021284805
2007	41719.48802913653
2008	39067.82208505541
2009	35693.114396383964
2010	36067.186728269684
2011	35474.99520156767
2012	35325.61757156767
2013	37335.895009714106
2014	40032.09164834374
2015	47894.489292677565
2016	50825.814594987016
2017	53279.89679197646
2018	55157.67267227289
2019	57562.56620337241
2020	58942.9357977633
2021	64606.15378057361
2022	66662.09260426821