Year	current international $
2000	6.69676666125693
2001	7.633753242152706
2002	9.141970620519883
2003	9.550782521988038
2004	12.14567547218504
2005	14.593879333669848
2006	18.37882734612334
2007	18.083131738667618
2008	18.8158961817033
2009	22.153285409183926
2010	23.93069909214266
2011	27.82121357217673
2012	25.679393571572128
2013	26.97047577644748
2014	27.145821845046793
2015	27.08394555771351
2016	27.315080634420365
2017	27.81952154835219
2018	29.29223007031496
2019	30.486204204442547
2020	29.04752744224958
2021	34.18020228794749