Year	current international $
1990	1570
1991	1630
1992	1440
1993	1490
1994	1610
1995	1610
1996	1850
1997	1810
1998	1730
1999	1790
2000	1740
2001	1840
2002	1750
2003	1500
2004	1370
2005	1330
2006	1250
2007	1150
2008	780
2009	1350
2010	1660
2011	1850
2012	2110
2013	2310
2014	2320
2015	2370
2016	2480
2017	2160
2018	2560
2019	2660
2020	2730
2021	3220
2022	3590
2023	3850