Year	constant 2015 US$
2000	4422.414107606195
2001	4543.8946349632115
2002	4592.309138333769
2003	4789.59546827795
2004	5024.167743368983
2005	5277.231938273526
2006	5456.00812488833
2007	5748.648886422767
2008	5941.852610439496
2009	5601.365659376277
2010	5759.548645260529
2011	5868.295883248878
2012	5871.699956186271
2013	5914.655923155511
2014	5952.770121889054
2015	6071.398762256091
2016	6202.602700117654
2017	6372.4622197441595
2018	6527.092701934975
2019	6639.514637097588
2020	6299.421346950385
2021	6819.162305388896
2022	7118.822742325641