Year	current US$
2000	84.23915669
2001	95.58723059
2002	71.8921256
2003	76.24156086
2004	85.68593638
2005	94.51237133
2006	94.91772509
2007	121.28802576
2008	129.93922567
2009	92.31020911
2010	103.14697131
2011	106.41349583
2012	104.30151917
2013	99.37917821
2014	101.39185354
2015	100.89235306
2016	99.73567617
2017	105.21939771
2018	111.3148845
2019	113.75535947
2020	98.02309619
2021	102.15906055