Year	current US$
2000	105.897595420567
2001	114.87542775377084
2002	134.44906268634497
2003	162.95249641147205
2004	203.56905606630448
2005	253.75586526265474
2006	305.24264700320316
2007	388.04251653992674
2008	488.9154381737747
2009	422.12508537759095
2010	456.20849550972565
2011	507.3279886837258
2012	532.6692729669003
2013	567.2917456772013
2014	537.3003439001543
2015	418.1720511959482
2016	407.80232504640276
2017	456.75121515017463
2018	475.8373941634858
2019	502.5745902518537
2020	554.5205041926993
2021	659.3181451650888