Year % of total final energy consumption 1990 4.3 1991 4.3 1992 6.9 1993 7.2 1994 6.8 1995 8.3 1996 7.4 1997 7.4 1998 10.1 1999 7.1 2000 8.8 2001 6.7 2002 6.2 2003 7.2 2004 7.7 2005 8 2006 10.1 2007 9.8 2008 9.3 2009 9.3 2010 7.5 2011 6.9 2012 6.6 2013 6.5 2014 7.4 2015 7.8 2016 8.1 2017 8.1 2018 7.7 2019 7.7 2020 8.2 2021 7.4 2022 7