Year	current international $
2000	5.331401252381157
2001	5.375243967767878
2002	6.459864104628644
2003	7.7012429837658845
2004	9.117103282835275
2005	10.42221370330065
2006	12.88419403735188
2007	12.930649593130724
2008	13.807050582519906
2009	15.495379342606642
2010	16.436820595739114
2011	18.676840679926617
2012	17.674306964429622
2013	20.475161890732434
2014	21.411775589995234
2015	20.195199794291504
2016	20.879625859506504
2017	21.059009487500788
2018	21.478099206547643
2019	22.96006743225568
2020	21.751932853460573
2021	27.696027305484325