Year	constant 2015 US$
2000	2205.8733074722054
2001	2250.842032547459
2002	2368.9054067966254
2003	2441.977340861901
2004	2736.250160358485
2005	2809.2276799287656
2006	3057.0353291488937
2007	3256.6560864685634
2008	3541.6608129390083
2009	3488.7170779982234
2010	3475.3909426148384
2011	3459.534586982128
2012	3410.7520980253666
2013	3550.2889727534116
2014	3633.2626024848328
2015	3873.5298564358436
2016	4126.671554056058
2017	4330.085019131156
2018	4598.898729719859
2019	4849.316381424154
2020	4746.633065553265
2021	5247.526948373258