Year	current international $
1990	5180
1991	5140
1992	5290
1993	5920
1994	5830
1995	6240
1996	6660
1997	6660
1998	6610
1999	6460
2000	6040
2001	6140
2002	6320
2003	6160
2004	6630
2005	6950
2006	7680
2007	8620
2008	9340
2009	9230
2010	10270
2011	10900
2012	10430
2013	11580
2014	12080
2015	12140
2016	12810
2017	13460
2018	13620
2019	13690
2020	13790
2021	14830
2022	15760
2023	16910