Year	current international $
1990	7820
1991	7100
1992	5010
1993	4980
1994	5280
1995	5550
1996	5840
1997	6530
1998	7110
1999	7340
2000	8030
2001	9070
2002	10100
2003	11010
2004	12030
2005	13770
2006	15460
2007	17700
2008	19320
2009	18210
2010	17880
2011	19230
2012	21140
2013	22590
2014	23850
2015	24860
2016	26680
2017	28600
2018	30390
2019	32810
2020	33730
2021	36090
2022	41010
2023	41420