Year	% of total final energy consumption
1990	7.8
1991	8.3
1992	7.9
1993	8
1994	8
1995	8.3
1996	8.2
1997	8
1998	7.6
1999	8
2000	7.8
2001	7.1
2002	7.3
2003	7.6
2004	7.8
2005	8
2006	8.5
2007	8.1
2008	8.3
2009	9.2
2010	11.4
2011	11.4
2012	14.2
2013	16.6
2014	16.4
2015	17.5
2016	16.4
2017	16.4
2018	17.9
2019	18.5
2020	20.1
2021	21.5