Year billion cubic meters 1992 1.62 1993 1.62 1994 1.62 1995 1.62 1996 0.72 1997 1.62 1998 1.62 1999 1.62 2000 1.62 2001 1.62 2002 1.62 2003 1.62 2004 1.62 2005 1.62 2006 1.62 2007 1.62 2008 1.62 2009 1.62 2010 1.62 2011 1.62 2012 1.62 2013 1.62 2014 1.62 2015 1.62 2016 1.62 2017 1.62 2018 1.62 2019 1.62 2020 1.62