Year	current international $
1990	4390
1991	4970
1992	5580
1993	5920
1994	5870
1995	5920
1996	5890
1997	6060
1998	6100
1999	6500
2000	7180
2001	7380
2002	7680
2003	8200
2004	8420
2005	8670
2006	9060
2007	9200
2008	8950
2009	9130
2010	8870
2011	9080
2012	8570
2013	8830
2014	8730
2015	9040
2016	8870
2017	8580
2018	8830
2019	9720
2020	9270
2021	11190
2022	12660
2023	13710