Year	current international $
1990	25690
1991	27070
1992	28250
1993	29410
1994	30260
1995	31960
1996	32880
1997	34840
1998	35560
1999	35470
2000	38100
2001	40140
2002	39690
2003	39750
2004	41060
2005	41960
2006	45370
2007	47780
2008	50590
2009	52350
2010	50340
2011	47580
2012	47570
2013	45530
2014	42120
2015	34960
2016	32360
2017	32370
2018	35720
2019	34690
2020	32550
2021	36290
2022	39750
2023	41280