Year	current international $
2000	4.45647534808431
2001	2.870773658938
2002	7.16422839344761
2003	18.2928658691534
2004	19.8367367661173
2005	20.1563534665108
2006	13.8247300851083
2007	17.0465423024137
2008	23.2062085592926
2009	27.1254337039452
2010	24.4574721036492
2011	20.8392176071038
2012	24.2417050937349
2013	18.1522891811392
2014	21.6234079724568
2015	17.7871928561674
2016	19.2761971851351
2017	14.0961596804364
2018	12.1742017996876
2019	11.2837982011016
2020	27.1200078929999
2021	27.9118300490826