Year	current international $
1990	19500
1991	19550
1992	19890
1993	20710
1994	21820
1995	22680
1996	23250
1997	24480
1998	25430
1999	26900
2000	28590
2001	29380
2002	30180
2003	31560
2004	33200
2005	35590
2006	37510
2007	38990
2008	39780
2009	38190
2010	39310
2011	40880
2012	41540
2013	43630
2014	45020
2015	43980
2016	45900
2017	47700
2018	49130
2019	49900
2020	48240
2021	55300
2022	61230
2023	60700