Year	current US$
1962	1550
1963	1760
1964	2070
1965	2470
1966	3010
1967	3150
1968	2820
1969	2510
1970	2550
1971	2990
1972	3680
1973	4880
1974	6580
1975	7370
1976	7840
1977	8870
1978	10690
1979	12970
1980	15190
1981	15990
1982	14860
1983	12380
1984	11710
1985	11740
1986	14020
1987	18800
1988	23100
1989	23820
1990	24410
1991	24860
1992	26080
1993	25680
1994	25250
1995	25080
1996	26790
1997	28130
1998	29070
1999	30270
2000	31730
2001	30770
2002	30750
2003	33410
2004	41650
2005	51040
2006	54890
2007	63100
2008	52430
2009	43610
2010	38020
2011	39370
2012	42510
2013	49180
2014	50210
2015	52790
2016	58720
2017	62450
2018	72600
2019	75160
2020	65870
2021	67000
2022	73930
2023	79840