Year	current international $
1990	19550
1991	20590
1992	21330
1993	21780
1994	22660
1995	23590
1996	24540
1997	25300
1998	26510
1999	27170
2000	29120
2001	29310
2002	31000
2003	32070
2004	33730
2005	34940
2006	37750
2007	39400
2008	41660
2009	40900
2010	42350
2011	44600
2012	46500
2013	48050
2014	48860
2015	49370
2016	52680
2017	53670
2018	56380
2019	60400
2020	59220
2021	64410
2022	70930
2023	73520