Year	current US$
1962	490
1963	530
1964	510
1965	540
1966	590
1967	660
1968	750
1969	850
1970	970
1971	1090
1972	1280
1973	1600
1974	2090
1975	2660
1976	2930
1977	3020
1978	3370
1979	3990
1980	4730
1981	5380
1982	5680
1983	6170
1984	6930
1985	7100
1986	7330
1987	8080
1988	9320
1989	10320
1990	11450
1991	12970
1992	15270
1993	17710
1994	20780
1995	23630
1996	25610
1997	27730
1998	24010
1999	23360
2000	23680
2001	22130
2002	22000
2003	23440
2004	26170
2005	28830
2006	32550
2007	36010
2008	37230
2009	37320
2010	44930
2011	48250
2012	51710
2013	54470
2014	56380
2015	53160
2016	53310
2017	54920
2018	56550
2019	58810
2020	55290
2021	64970
2022	66970
2023	70590