Year	current international $
1990	18730
1991	19720
1992	20390
1993	20800
1994	22030
1995	22920
1996	23270
1997	24310
1998	24960
1999	26030
2000	28500
2001	29340
2002	30810
2003	31530
2004	32510
2005	33590
2006	35770
2007	37310
2008	38800
2009	38450
2010	40440
2011	41010
2012	43270
2013	44750
2014	45870
2015	46850
2016	49060
2017	50900
2018	53000
2019	57170
2020	56330
2021	62770
2022	69310
2023	71990