Year	current international $
1990	6270
1991	6590
1992	7380
1993	7560
1994	7830
1995	8350
1996	8920
1997	9960
1998	10970
1999	11950
2000	12760
2001	13760
2002	15120
2003	17420
2004	19820
2005	21150
2006	24480
2007	26390
2008	27670
2009	26210
2010	27360
2011	25840
2012	27450
2013	28070
2014	28190
2015	27510
2016	25650
2017	26420
2018	25890
2019	25960
2020	22760
2021	27530
2022	28540
2023	30400