Year	current international $
1990	12640
1991	11570
1992	11770
1993	12130
1994	12740
1995	13740
1996	14470
1997	14600
1998	14760
1999	15110
2000	15920
2001	17130
2002	17600
2003	18880
2004	19940
2005	21070
2006	22430
2007	24600
2008	26270
2009	25840
2010	25790
2011	26660
2012	27370
2013	28860
2014	30270
2015	31570
2016	33660
2017	36630
2018	38890
2019	42150
2020	41730
2021	46440
2022	49350
2023	51370