Year	current international $
1991	2640
1992	3490
1993	4490
1994	4540
1995	4570
1996	5000
1997	5900
1998	7790
1999	8950
2000	10470
2001	10550
2002	9430
2003	6020
2004	9210
2005	9450
2006	10260
2007	10860
2008	11860
2009	11920
2010	12240
2011	12810
2012	14380
2013	14520
2014	13020
2015	9200
2016	8940
2017	10040
2018	11850
2019	12080
2020	10360
2021	12470
2022	14150
2023	14040