Year	current international $
1990	1510
1991	1440
1992	1580
1993	1620
1994	1530
1995	1580
1996	1560
1997	1610
1998	1610
1999	1640
2000	1820
2001	1870
2002	1890
2003	1930
2004	1980
2005	2060
2006	2140
2007	2180
2008	2260
2009	2300
2010	2370
2011	2460
2012	2660
2013	2820
2014	2940
2015	2950
2016	3140
2017	3340
2018	3300
2019	3310
2020	3260
2021	3440
2022	3710
2023	3860