Year	constant 2015 US$
2000	16580.210396020964
2001	16958.413218968893
2002	17288.8733263539
2003	17678.129131630005
2004	17586.555923728545
2005	17607.358568745407
2006	17803.68852591588
2007	18415.450841919752
2008	19652.46528590696
2009	18583.196796580756
2010	19532.36436496075
2011	20103.026364718236
2012	20264.683028400505
2013	21013.27735781865
2014	22100.2443706796
2015	23544.295529135718
2016	22695.782626381893
2017	24408.142598403527
2018	25511.725019865145
2019	26322.370403518136
2020	23309.78387363734
2021	26128.71228016021
2022	27631.110175254624
2023	28348.526100228817