Year	constant 2015 US$
1995	29092.420551226314
1996	29623.806939092516
1997	30319.75503412204
1998	31010.34485850085
1999	31608.060376208414
2000	32299.98089650736
2001	33061.58383001205
2002	33166.772632029155
2003	33116.816894614356
2004	33397.643109550656
2005	33395.64072529186
2006	33702.66668364985
2007	34032.218765772624
2008	32928.71427320537
2009	31755.274536536715
2010	31809.79070008618
2011	31728.776269259648
2012	30621.694177223326
2013	29822.696486890738
2014	29802.049845312406
2015	30033.310820901293
2016	31028.572860645385
2017	31554.9903110957
2018	32036.492200398065
2019	32546.046589756104
2020	30180.669421279817
2021	32429.44503085516
2022	32661.23180612324
2023	33616.731730703425