Year	current US$
1997	2964109748.565649
1998	2970422609.7962484
1999	3065167173.8256254
2000	3340576930.3809237
2001	3151598019.202446
2002	3171361485.1784987
2003	3469011638.6876984
2004	4106786117.8961406
2005	5172133344.475384
2006	6905895467.83311
2007	8084819053.75574
2008	8921852943.22132
2009	8184624126.783904
2010	8951985289.523264
2011	9831364632.967546
2012	10168952831.980854
2013	10679510079.331144
2014	11054235822.725195
2015	11323667418.66802
2016	10733777448.62971
2017	11787174468.317564
2018	12833855271.269053
2019	13064499219.98623