Year	current US$
1960	827000000
1961	594000000
1962	834000000
1963	985000000
1964	1070000000
1965	968000000
1966	916000000
1967	1112000000
1968	533000000
1969	713000000
1970	775000000
1971	608000000
1972	1158000000
1973	1127000000
1974	2206000000
1975	2213000000
1976	2311000000
1977	2586000000
1978	3859000000
1979	4498000000
1980	5350000000
1981	5631000000
1982	5465000000
1983	5329000000
1984	5853000000
1985	5890000000
1986	5374000000
1987	5822000000
1988	6590000000
1989	7143000000
1990	7376000000
1991	8439000000
1992	9379000000
1993	9500000000
1994	8889000000
1995	11461000000
1996	12131000000
1997	11596000000
1998	9308000000
1999	10207000000
2000	10864000000
2001	10191000000
2002	11233000000
2003	13038000000
2004	17949000000
2005	25357000000
2006	29825000000
2007	32590000000
2008	42329000000
2009	31668000000
2010	37807000000
2011	44012000000
2012	44105000000
2013	44647000000
2014	47590000000
2015	44168000000
2016	46847000000
2017	57746000000
2018	60078000000
2019	50332000000
2020	45837000000
2021	72489000000
2022	70781000000
2023	50500000000