Year Mains Gas Bottled Gas Total
1990 96317 17940 114257
1991 109659 22600 132259
1992 101942 20840 122782
1993 104985 20370 125355
1994 102293 20590 122883
1995 104955 26840 131795
1996 115678 33000 148678
1997 105140 33340 138480
1998 106222 33810 140032
1999 101500 31090 132590
2000 106333 27400 133733
2001 102500 25900 128400
2002 98500 23350 121850
2003 103690 23170 126860
2004 103100 29100 132200
2005 100565 28975 129540
2006 93778 30005 123783
2007 82463 26231 108694
2008 86636 26930 113566
2009 82948 27998 110946
2010 84755 31377 116132
2011 74532 24258 98790
2012 69138 19949 89087
2013 71923 23605 95528
2014 61100 22015 83115
2015 63341 18777 82118
2016 60682 18186 78868
2017 55262 19277 74539
2018 62711 19987 82698
2019 57864 17825 75689