Year	current US$
1962	1560
1963	1710
1964	1890
1965	2060
1966	2230
1967	2380
1968	2580
1969	2830
1970	3040
1971	3260
1972	3680
1973	4700
1974	5810
1975	6750
1976	7170
1977	7840
1978	8860
1979	10850
1980	13100
1981	13200
1982	12050
1983	10450
1984	9830
1985	9780
1986	11350
1987	14500
1988	18570
1989	19550
1990	20710
1991	21420
1992	23840
1993	23580
1994	24380
1995	25740
1996	27110
1997	26930
1998	25820
1999	25420
2000	24990
2001	23870
2002	23150
2003	26000
2004	31450
2005	35920
2006	37880
2007	40160
2008	43540
2009	44070
2010	43970
2011	44440
2012	43410
2013	43800
2014	43340
2015	41130
2016	39100
2017	38320
2018	41170
2019	42460
2020	39250
2021	43810
2022	45290
2023	45070