Year	current US$
2000	589.55716584
2001	597.33156291
2002	661.38593866
2003	822.66280317
2004	946.08777971
2005	981.41797556
2006	1094.92141514
2007	1246.39940473
2008	1412.0884156
2009	1389.05141451
2010	1357.36028026
2011	1469.42357517
2012	1379.86453294
2013	1447.75250652
2014	1474.25817026
2015	1161.98791513
2016	1060.52038132
2017	1068.2333043
2018	1130.06721971
2019	1118.94609985
2020	1104.49474486
2021	1311.93277996