Year	current international $
2000	14.273889548307
2001	13.3169837349059
2002	14.2295597218403
2003	19.5146494291672
2004	22.1524924964135
2005	20.7127568593461
2006	18.9413044967372
2007	15.8610999373196
2008	11.7761551224627
2009	11.207170956371
2010	11.5867680382633
2011	10.6852551586946
2012	7.05749770555819
2013	14.3088237528565
2014	16.4789843119566
2015	17.9903136874878
2016	25.4205350784684
2017	25.3613742748617
2018	25.7610600410632
2019	25.8854682765854
2020	31.422287657791
2021	31.3752256400271