Year	current US$
1960	13000000
1961	14000000
1962	10000000
1963	11000000
1964	17000000
1965	16000000
1966	13000000
1967	11000000
1968	11000000
1969	17000000
1970	33000000
1971	29000000
1972	34000000
1973	58000000
1974	64000000
1975	53000000
1976	84000000
1977	125000000
1978	112000000
1979	148000000
1980	205000000
1981	154000000
1982	145000000
1983	165000000
1984	132000000
1985	123000000
1986	211000000
1987	178000000
1988	214000000
1989	246000000
1990	359000000
1991	312000000
1992	342000000
1993	478000000
1994	335000000
1995	441000000
1996	433000000
1997	561000000
1998	556000000
1999	571000000
2000	545000000
2001	725000000
2002	874000000
2003	928000000
2004	976000000
2005	1101000000
2006	1550000000
2007	1556000000
2008	2097000000
2009	1774000000
2010	1996000000
2011	2374000000
2012	2610000000
2013	2339000000
2014	2776000000
2015	2717000000
2016	2826000000
2017	2896000000
2018	3584000000
2019	3675000000
2020	4794000000
2021	4858000000
2022	5046000000
2023	5321000000