Year	current international $
1990	7190
1991	6870
1992	5620
1993	5570
1994	5690
1995	6260
1996	6810
1997	7590
1998	8210
1999	8190
2000	9070
2001	9810
2002	11050
2003	12370
2004	13720
2005	15870
2006	18280
2007	20480
2008	21610
2009	19850
2010	20450
2011	23300
2012	24920
2013	26800
2014	28120
2015	28530
2016	30620
2017	32990
2018	35640
2019	39070
2020	39490
2021	43940
2022	46760
2023	47350