Year	current international $
1990	1230
1991	1280
1992	1310
1993	1310
1994	1380
1995	1400
1996	1490
1997	1540
1998	1520
1999	1580
2000	1630
2001	1950
2002	2000
2003	2110
2004	2130
2005	2150
2006	2220
2007	2650
2008	2760
2009	2640
2010	2730
2011	2700
2012	2650
2013	2890
2014	3070
2015	3370
2016	3320
2017	2960
2018	3110
2019	3010
2020	3030
2021	2870
2022	3180
2023	3270