Year	current US$
1992	8050000000
1993	10128000000
1994	5130667448.287413
1995	4877619759.413482
1996	5398456707.097155
1997	5684838760.270678
1998	5826805858.115594
1999	4281472054.5454545
2000	18699788397.101448
2001	7061817563
2002	8430337554.613241
2003	8710928320.457901
2004	9989337555.951464
2005	11457022323.412607
2006	13982218317.687119
2007	16102883772.572334
2008	18458639111.611343
2009	17862576444.94998
2010	20654940435.822514
2011	24543304631.59358
2012	27710051425.57434
2013	29868626861.782948
2014	32869069802.462585
2015	35126777862.43226
2016	36345366908.66419
2017	36945658210.50053
2018	45864379355.53552
2019	48961721320.982056
2020	47449011448.656624
2021	53338482783.539345
2022	62284414213.45291
2023	64288287002.996895