Year	current international $
1990	1670
1991	1690
1992	1670
1993	1640
1994	1680
1995	1760
1996	1830
1997	1830
1998	1870
1999	1880
2000	1880
2001	1930
2002	1920
2003	1950
2004	2050
2005	2190
2006	2320
2007	2470
2008	2460
2009	2170
2010	2320
2011	2470
2012	2540
2013	2760
2014	2990
2015	3330
2016	3880
2017	4120
2018	4370
2019	4640
2020	4730
2021	5270
2022	5810
2023	6220