Year % of total final energy consumption 1990 0 1991 0 1992 0 1993 0 1994 0 1995 0 1996 0 1997 0 1998 0 1999 0 2000 0 2001 0.4 2002 0.4 2003 1.5 2004 1.6 2005 1.7 2006 2 2007 3.5 2008 2 2009 1.5 2010 1.3 2011 1.4 2012 1.4 2013 1.4 2014 1.4 2015 1.4 2016 1.2 2017 1.1 2018 1.1 2019 1.1 2020 1.4 2021 1.1 2022 1.1