Year % of total final energy consumption 1990 8.3 1991 8.1 1992 7.7 1993 8.1 1994 7.4 1995 7.4 1996 6.2 1997 8.3 1998 10.2 1999 10.3 2000 10.5 2001 10.4 2002 10.5 2003 10.4 2004 10.6 2005 10.6 2006 10.4 2007 9.9 2008 10.8 2009 10.5 2010 10.8 2011 11.4 2012 11.5 2013 10.8 2014 11 2015 10.5 2016 10.4 2017 10.2 2018 10.7 2019 10.4 2020 10.3 2021 10.2 2022 10