Year	current international $
2000	6.54286283906808
2001	5.40998677594458
2002	4.1675492358698
2003	5.25314138065961
2004	6.89084129512239
2005	6.32578220296481
2006	6.28635764584338
2007	7.8390778743175
2008	7.49287885495134
2009	7.03233403757069
2010	6.73622324628114
2011	6.42645679965529
2012	7.04299236921071
2013	7.75076198790245
2014	8.58905049053739
2015	9.17026395992811
2016	8.68593392454225
2017	10.1593492701389
2018	9.89585078260636
2019	9.33354119527325
2020	24.2533670923251
2021	24.0656683844856