Year	current US$
1992	2900000000
1993	6733333333.333333
1994	4924369747.899159
1995	3457652474.1081705
1996	3470692307.692308
1997	3792218798.151002
1998	4065922393.2365055
1999	2877585238.668271
2000	3234973226.2382865
2001	2935611510.7913666
2002	3236689522.703415
2003	4448219883.291814
2004	6634062566.542916
2005	8597932974.90041
2006	11895866751.221695
2007	15435351897.412958
2008	22868095862.19809
2009	18753907019.20839
2010	23268412729.854862
2011	22986473365.858364
2012	23051985750.098957
2013	29303202121.609673
2014	27459629698.457565
2015	16391445680.927841
2016	12635940656.31498
2017	15339934649.24946
2018	16856039041.856922
2019	18775370102.921764
2020	16849656190.115082
2021	16986813987.611649
2022	15933894368.07433
2023	17310821819.874638