Year	current international $
1990	20530
1991	22210
1992	23230
1993	24580
1994	26320
1995	26850
1996	26800
1997	28250
1998	28640
1999	27890
2000	30320
2001	31210
2002	29780
2003	31810
2004	34480
2005	28910
2006	35760
2007	33470
2008	38420
2009	33950
2010	32280
2011	32440
2012	33220
2013	34660
2014	35410
2015	35660
2016	35750
2017	36560
2018	37730
2019	38310
2020	29630
2021	37070
2022	43670