Year	% of total final energy consumption
1990	39.4
1991	39.9
1992	37.3
1993	37.1
1994	35.9
1995	33.3
1996	31.7
1997	31.7
1998	39.4
1999	36.7
2000	38.6
2001	41.2
2002	40.2
2003	40.9
2004	37.8
2005	38.4
2006	38.7
2007	36
2008	33.7
2009	32.9
2010	32.2
2011	30.6
2012	30.8
2013	28.4
2014	28.6
2015	27.4
2016	27.2
2017	27.6
2018	27.9
2019	27.1
2020	31.6
2021	30.6