Year	current US$
2000	13.94289014
2001	23.90716577
2002	30.85931309
2003	40.67306938
2004	46.84293229
2005	50.72355379
2006	60.72194101
2007	76.21551624
2008	92.34157035
2009	104.27446247
2010	135.76652937
2011	163.56296687
2012	199.89436758
2013	237.12418049
2014	267.56746493
2015	269.08384303
2016	273.64930441
2017	290.11476591
2018	314.63718608
2019	303.63790325
2020	286.57512762
2021	314.88390912