Year	current international $
1990	588.2166286633403
1991	579.9755240513917
1992	770.2945845813613
1993	843.7437925134892
1994	968.6211928498873
1995	1118.8671008397957
1996	1826.8022737263964
1997	4468.851516664109
1998	5378.831214199981
1999	6590.192168198036
2000	7618.659662686242
2001	12120.810759388765
2002	14025.419588654033
2003	15564.203050568369
2004	21077.121182247287
2005	24252.665512790547
2006	25716.684536552653
2007	29057.25219461057
2008	33270.18495861956
2009	32341.598474696108
2010	28428.586666564173
2011	29556.11310097847
2012	32522.40879306466
2013	30204.241959904208
2014	29373.073797532892
2015	21025.31484443663
2016	17949.83316462153
2017	19854.229939635916
2018	19814.636719130245
2019	17692.299779163674
2020	14709.023755495005
2021	18100.913925487075
2022	19610.176544525773
2023	18723.647083821237