Year	current international $
1990	20130
1991	21360
1992	21960
1993	22440
1994	23010
1995	24060
1996	25300
1997	25960
1998	25820
1999	26050
2000	27680
2001	28380
2002	29040
2003	29870
2004	31430
2005	32880
2006	34530
2007	36090
2008	36220
2009	34390
2010	36280
2011	37270
2012	38640
2013	40760
2014	41030
2015	42510
2016	42010
2017	42980
2018	43750
2019	44350
2020	43990
2021	46680
2022	49980
2023	52640