Year	current US$
1960	101000000
1961	127000000
1965	248000000
1966	262000000
1967	300000000
1968	296000000
1969	352000000
1970	399000000
1971	572000000
1972	579000000
1973	785000000
1974	990000000
1975	1096000000
1976	1239000000
1977	1424000000
1978	1733000000
1979	2043000000
1980	2221000000
1981	2586700000
1982	2515200000
1983	2723400000
1984	2735200000
1985	2319800000
1986	2667300000
1987	3306700000
1988	3749300000
1989	4189800000
1990	4825000000
1991	5064100000
1992	5405000000
1993	6229100000
1994	7411300000
1995	8131100000
1996	8705800000
1997	8825600000
1998	9055500000
1999	10046800000
2000	11849200000
2001	11705800000
2002	10633700000
2003	10978100000
2004	13147400000
2005	14119500000
2006	15071900000
2007	17821500000
2008	20053000000
2009	17568200000
2010	18467900000
2011	20155200000
2012	21963500000
2013	22509700000
2014	23377400000
2015	23880600000
2016	25921600000
2017	29031400000
2018	31855900000
2019	33450800000
2020	26072700000
2021	34235300000
2022	44509100000
2023	44123000000