Year	current international $
1990	9470
1991	9950
1992	10240
1993	10820
1994	11250
1995	11820
1996	12230
1997	12950
1998	13290
1999	14410
2000	15400
2001	15840
2002	16030
2003	16480
2004	18710
2005	19190
2006	19860
2007	20720
2008	20610
2009	20150
2010	20220
2011	20840
2012	21660
2013	21950
2014	22060
2015	22150
2016	22100
2017	21820
2018	23260
2019	25210
2020	25140
2021	27960
2022	31480
2023	32990