Year	% of total final energy consumption
1990	3.9
1991	4.3
1992	4.9
1993	5
1994	5.1
1995	5.4
1996	5.1
1997	5.2
1998	5.2
1999	5.2
2000	5.2
2001	5.1
2002	5.2
2003	5
2004	4.6
2005	7.3
2006	7.9
2007	9
2008	9
2009	12.3
2010	13.5
2011	14.7
2012	16.5
2013	17.2
2014	15.7
2015	15.6
2016	15.3
2017	14.6
2018	13.6
2019	13.6
2020	14.8
2021	15.3