Year	current international $
1990	8360
1991	8560
1992	9130
1993	9930
1994	9350
1995	10110
1996	10840
1997	11650
1998	8870
1999	8530
2000	9360
2001	8930
2002	9110
2003	9420
2004	10710
2005	11740
2006	13440
2007	14730
2008	15880
2009	15260
2010	17200
2011	19420
2012	20470
2013	22170
2014	23890
2015	25570
2016	26410
2017	27840
2018	27900
2019	28020
2020	28340
2021	31230
2022	37980
2023	43700