Year	% of total final energy consumption
1990	12
1991	13.2
1992	14.2
1993	13.2
1994	13.8
1995	13.2
1996	12.9
1997	13.9
1998	13.7
1999	15
2000	15.3
2001	14
2002	12.8
2003	13.4
2004	14.6
2005	14.2
2006	15.6
2007	16.6
2008	16.4
2009	16.2
2010	13.8
2011	14.8
2012	13.8
2013	15.4
2014	12.1
2015	15.4
2016	14.6
2017	14.3
2018	14.6
2019	15.8
2020	31.2
2021	33.7