Year	current US$
1962	2380
1963	2410
1964	2520
1965	2720
1966	2980
1967	3150
1968	3430
1969	3740
1970	4010
1971	4360
1972	5010
1973	6040
1974	7190
1975	8020
1976	8780
1977	9130
1978	9750
1979	10600
1980	11600
1981	12370
1982	11900
1983	12180
1984	13150
1985	13940
1986	14560
1987	16320
1988	18620
1989	19860
1990	20650
1991	20990
1992	21420
1993	21270
1994	20890
1995	20850
1996	20820
1997	21330
1998	20900
1999	21450
2000	22740
2001	23120
2002	23590
2003	25480
2004	29530
2005	34310
2006	37900
2007	41540
2008	44930
2009	43230
2010	44490
2011	47190
2012	51080
2013	52800
2014	52200
2015	47580
2016	43900
2017	42900
2018	45060
2019	46580
2020	43900
2021	48780
2022	53300
2023	53930