Year	current international $
2000	23.3617304959268
2001	25.0981162318428
2002	26.0343289336567
2003	26.4407707757399
2004	27.0310485611462
2005	29.3015717505307
2006	30.6022350188581
2007	30.4413434530248
2008	30.5279933299281
2009	31.31126841106
2010	31.8558510427592
2011	32.4941959582617
2012	30.9382874276616
2013	28.9861052348054
2014	29.2506114660376
2015	33.2620330209125
2016	31.5196589509552
2017	33.3348677328055
2018	35.5567604223463
2019	35.2733927221888
2020	36.9622801867143
2021	37.2990637807068