Year	current international $
1990	2550
1991	1880
1992	1740
1993	2110
1994	2300
1995	2710
1996	3050
1997	2780
1998	3110
1999	3550
2000	3980
2001	4440
2002	4870
2003	5130
2004	5560
2005	5980
2006	6760
2007	7490
2008	8270
2009	8670
2010	9530
2011	10210
2012	10450
2013	10750
2014	11360
2015	11800
2016	12270
2017	12800
2018	13480
2019	14430
2020	14200
2021	16040
2022	19140
2023	21110