Year	current US$
2000	35.35651099153212
2001	35.33378159928984
2002	34.325445109628625
2003	37.66974572986392
2004	42.536195390219
2005	49.411966910165255
2006	55.06824780251296
2007	64.03747195707753
2008	72.74443338698605
2009	73.29028537067391
2010	84.3271627841747
2011	96.0079024512188
2012	100.47463039029597
2013	106.26807513510303
2014	107.41643477144028
2015	102.85059283240703
2016	104.2006885556686
2017	112.85079767837654
2018	118.83915608589722
2019	122.06648588324315
2020	121.38348151060654
2021	138.15824742199325