Year	current US$
2000	1378.75932165
2001	1416.1947546
2002	1536.92386402
2003	2086.30326714
2004	2484.45629546
2005	2547.64682761
2006	2644.76568614
2007	3015.47089457
2008	3524.99275466
2009	3539.14995263
2010	3454.78793891
2011	3755.86653282
2012	3597.02372245
2013	3765.05347755
2014	3867.07967715
2015	3393.24897478
2016	3487.69888414
2017	3669.68721972
2018	3965.58740465
2019	3798.74504762
2020	3976.24491225
2021	4407.61374539