Year	current international $
2000	21.2013511778082
2001	22.7700570406343
2002	23.6154912943524
2003	23.9957919247947
2004	24.512234897834
2005	26.531537384412
2006	27.6906506041231
2007	27.5712444188915
2008	27.6468769767419
2009	28.368791922458
2010	28.8853997187222
2011	29.7053098020959
2012	30.012242484407
2013	28.1911351573476
2014	27.5406227460394
2015	31.454087799554
2016	30.2580536604162
2017	31.1421355671745
2018	31.72292855564
2019	33.1412168183624
2020	34.4221433845981
2021	32.2341685018757