Year billion cubic meters 1992 48.93 1993 48.93 1994 48.93 1995 48.93 1996 48.93 1997 48.93 1998 48.93 1999 48.93 2000 48.93 2001 48.93 2002 48.93 2003 48.93 2004 48.93 2005 48.93 2006 48.93 2007 48.93 2008 48.93 2009 48.93 2010 48.93 2011 48.93 2012 48.93 2013 48.93 2014 48.93 2015 48.93 2016 48.93 2017 48.93 2018 48.93 2019 48.93 2020 48.93