Year % of total final energy consumption 2002 1.5 2003 1.1 2004 6.3 2005 2.7 2006 3.3 2007 1.9 2008 1.3 2009 1.9 2010 1.9 2011 2.9 2012 3.5 2013 2.1 2014 1.9 2015 2.2 2016 1.9 2017 1.9 2018 2 2019 1.9 2020 2 2021 3.2 2022 2.7