Year	current US$
1960	117000000
1961	119000000
1962	136000000
1963	154000000
1964	178000000
1965	189000000
1966	189000000
1967	207000000
1968	213000000
1969	202000000
1970	229000000
1971	228000000
1972	273000000
1973	352000000
1974	463000000
1975	531000000
1976	743000000
1977	972000000
1978	848000000
1979	1223000000
1980	967000000
1981	797000000
1982	699000000
1983	735000000
1984	717000000
1985	679000000
1986	755000000
1987	591000000
1988	609000000
1989	498000000
1990	582000000
1991	588000000
1992	796000000
1993	1032000000
1994	1249000000
1995	1652000000
1996	1789000000
1997	2416000000
1998	2452000000
1999	2510000000
2000	2941000000
2001	2864000000
2002	2996000000
2003	3128000000
2004	3305000000
2005	3418000000
2006	3706000000
2007	4015000000
2008	4641000000
2009	3866000000
2010	4499000000
2011	5308000000
2012	5339000000
2013	5491000000
2014	5302000000
2015	5509000000
2016	5420000000
2017	5760000000
2018	5905000000
2019	5905000000
2020	4805000000
2021	6395000000
2022	7115000000
2023	6498000000