Year	current international $
1990	1510
1991	1560
1992	1580
1993	1580
1994	1570
1995	1660
1996	1700
1997	1740
1998	1830
1999	1920
2000	1990
2001	2080
2002	2050
2003	2170
2004	2270
2005	2390
2006	2460
2007	2530
2008	2610
2009	2610
2010	2660
2011	2660
2012	2730
2013	2740
2014	2830
2015	2960
2016	3080
2017	3210
2018	3360
2019	3630
2020	3770
2021	4150
2022	4460
2023	4670