Year	% of total final energy consumption
1990	2.5
1991	2.1
1992	2.3
1993	6.1
1994	6.2
1995	6.3
1996	5.9
1997	6
1998	6.5
1999	6.4
2000	6.9
2001	7.3
2002	7.5
2003	7.3
2004	7.3
2005	7.2
2006	7.2
2007	7.3
2008	8
2009	8.8
2010	9.5
2011	10.4
2012	10.9
2013	11.4
2014	11.6
2015	11.9
2016	11.3
2017	11.1
2018	15.1
2019	15.6
2020	16.1
2021	15.2