Year	current international $
1990	16780
1991	17120
1992	17550
1993	18710
1994	19730
1995	20310
1996	21350
1997	22350
1998	23610
1999	24690
2000	25780
2001	26870
2002	28250
2003	29270
2004	30860
2005	31810
2006	33490
2007	35020
2008	36000
2009	38900
2010	37840
2011	40340
2012	41560
2013	44790
2014	45690
2015	45350
2016	46170
2017	47090
2018	48670
2019	50970
2020	52840
2021	56780
2022	62900
2023	66260