Year	current international $
2000	3.37996242562472
2001	4.13273544100825
2002	3.07098937909856
2003	3.45855391463596
2004	7.20977736089153
2005	5.76443888463925
2006	10.1205034282514
2007	13.0171493692406
2008	17.1425428566923
2009	14.2313739255818
2010	19.0194589703271
2011	18.683597991659
2012	15.1140889315574
2013	11.959505208391
2014	14.0718895298291
2015	11.3859938871794
2016	13.4675191948029
2017	24.2735159769789
2018	25.2794913893856
2019	25.1099404199946
2020	28.4956911095931
2021	23.137997382312