Year	current international $
1990	23820
1991	26190
1992	26680
1993	28490
1994	27890
1995	29640
1996	30620
1997	30100
1998	31310
1999	31700
2000	38390
2001	38750
2002	38910
2003	40990
2004	42090
2005	43630
2006	44710
2007	46740
2008	46360
2009	41820
2010	43510
2011	43420
2012	52080
2013	51830
2014	49720
2015	43560
2016	43030
2017	46540
2018	47440
2019	50570
2020	47790
2021	50850
2022	57970
2023	60090