| 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 |
| 2020 |
52287 |
13486 |
65773 |
| 2021 |
52939 |
14659 |
67598 |