Year	current US$
2000	1432.3527701924309
2001	1474.970667361836
2002	1651.2387768053434
2003	2071.3787982210015
2004	2374.380710433747
2005	2486.3786929871576
2006	2636.2478180046774
2007	3008.401019526429
2008	3418.1157903309763
2009	3342.0540211989714
2010	3270.555985485734
2011	3525.836776584583
2012	3300.5287118053675
2013	3462.301789277067
2014	3538.0245792544797
2015	3044.856648880356
2016	3106.8703772171516
2017	3281.3330185298582
2018	3537.5749462260897
2019	3493.603062185421
2020	3736.950883188934
2021	4215.433322243741