Year	current international $
1990	4437.055217674497
1991	4872.1396879470585
1992	5533.632681027312
1993	6026.750095924687
1994	6473.886966614053
1995	7250.188761637707
1996	7959.485753502293
1997	8581.436492301907
1998	8927.836441583071
1999	8921.986048432116
2000	9468.318766473938
2001	9876.225077754627
2002	10239.38528790291
2003	10820.67162120067
2004	11735.176170217439
2005	12685.027963949144
2006	15676.58342821085
2007	16875.71456325115
2008	16550.448913732347
2009	16118.376746500046
2010	18104.724595774336
2011	20330.524598885317
2012	21584.681267262484
2013	22425.589415810446
2014	22779.427670328103
2015	22691.48662444846
2016	23492.28785672382
2017	24546.912421394238
2018	25564.536716894498
2019	25824.646525455
2020	25443.214014618177
2021	29050.08079387783
2022	31586.136898183242
2023	33284.494733864914