Year	constant 2011 international $
1999	21463.5367973425
2000	21912.7963120459
2001	21188.9377090634
2002	20652.4859971805
2003	22969.1188819091
2004	23617.3897342214
2005	26017.8847514014
2006	27293.7639816988
2007	28600.4293737634
2008	28956.3933830752
2009	28375.2402506169
2010	29493.8573886583
2011	11096.1563633459
2012	24609.004823378
2013	21145.7528009344
2014	15965.4917465213
2015	14423.0386965157
2016	13860.3700053907
2017	17321.461210424
2018	18405.5040314043