Year	current US$
2000	2.292198343239046
2001	3.4079949508697056
2002	4.390724065260868
2003	5.739405332834104
2004	7.521237020471139
2005	8.394915050061236
2006	12.293185916523017
2007	12.556570592105146
2008	12.902476039453818
2009	13.258766024290185
2010	17.912846701949302
2011	22.349818015803802
2012	19.791972084291046
2013	20.703581116247918
2014	20.710706254260177
2015	18.359105152807135
2016	15.246389318816776
2017	13.513724618732992
2018	14.651273551135391
2019	14.324616106515395
2020	14.602717992134304
2021	27.9488961958766