Year	constant 2015 US$
2005	128.9457505043735
2006	4535.137143335144
2007	5401.30990780851
2008	6572.267682459691
2009	4585.001672718199
2010	2223.9793960223665
2011	3840.5470109306343
2012	3938.151846154125
2013	4510.290946880249
2014	4445.197000437262
2015	4149.27019753246
2016	3373.6660573933395
2017	2927.5512985927467
2018	2886.9125129570166
2019	2349.523611841046