Year	current international $
1991	2380
1992	2070
1993	1790
1994	1440
1995	1370
1996	1470
1997	1600
1998	1610
1999	1640
2000	1750
2001	1910
2002	1930
2003	2090
2004	2240
2005	2300
2006	2470
2007	2730
2008	2910
2009	2980
2010	2890
2011	2950
2012	3520
2013	3810
2014	4100
2015	4050
2016	4430
2017	4800
2018	4720
2019	4960
2020	5130
2021	5410
2022	6240
2023	6750