Year	current international $
1990	12260
1991	11560
1992	11210
1993	11870
1994	12990
1995	13690
1996	14340
1997	15270
1998	16030
1999	17070
2000	17960
2001	18940
2002	20060
2003	20890
2004	22440
2005	23630
2006	25400
2007	26940
2008	28830
2009	27080
2010	27450
2011	28540
2012	28590
2013	29570
2014	30590
2015	30650
2016	33080
2017	35850
2018	38390
2019	42090
2020	41820
2021	45940
2022	50290
2023	54130