Year	current international $
2000	26.1300172200472
2001	25.5943817255767
2002	25.2345181101392
2003	28.9530121120957
2004	25.3648496107644
2005	28.3215474396414
2006	28.0781765627211
2007	29.8006807153529
2008	29.7660341270128
2009	30.0937235275506
2010	31.192584654079
2011	25.0440698328429
2012	24.8830842268563
2013	25.200691954165
2014	24.2602737841781
2015	24.2000517771442
2016	24.6368173008862
2017	22.5269519777139
2018	23.3348056844779
2019	20.3954296706172
2020	20.2296527519651
2021	21.8260809973303