Year	current international $
1990	2660
1991	2470
1992	1250
1993	1440
1994	1580
1995	1810
1996	1960
1997	2140
1998	2290
1999	2420
2000	2650
2001	3000
2002	3500
2003	4090
2004	4710
2005	5570
2006	6570
2007	7780
2008	8580
2009	7340
2010	7700
2011	8160
2012	9650
2013	10450
2014	10610
2015	10600
2016	11290
2017	13050
2018	13700
2019	15940
2020	15280
2021	16400
2022	19560
2023	22440