Year	current US$
1962	1870
1963	1970
1964	2110
1965	2270
1966	2350
1967	2540
1968	2730
1969	2980
1970	3270
1971	3470
1972	3890
1973	4650
1974	5950
1975	7220
1976	7870
1977	8080
1978	8470
1979	9600
1980	10830
1981	11870
1982	12080
1983	11570
1984	12000
1985	11990
1986	12310
1987	12560
1988	14140
1989	15600
1990	17340
1991	18240
1992	18570
1993	18950
1994	18930
1995	19370
1996	20590
1997	22060
1998	21920
1999	21610
2000	21300
2001	20330
2002	20210
2003	21380
2004	25850
2005	30740
2006	34600
2007	37390
2008	42410
2009	44100
2010	46750
2011	50410
2012	60290
2013	66090
2014	65240
2015	60550
2016	54140
2017	51530
2018	53150
2019	54970
2020	53630
2021	57240
2022	60820
2023	63140