Year	current US$
2000	51.55858793
2001	65.24680588
2002	70.25167613
2003	72.57032129
2004	78.64595807
2005	88.50482729
2006	95.42688966
2007	103.02828195
2008	112.08709445
2009	102.3845701
2010	111.30715355
2011	120.74814925
2012	125.44972762
2013	117.01709156
2014	128.35404733
2015	140.9609294
2016	149.3101358
2017	167.25934103
2018	165.58419859
2019	169.10078218
2020	175.5978499
2021	217.88052677