Indicator | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
Gas performance index | 100 | 105 | 128 | 142 | 142 | 156 |
Capacity, access and availability | 100 | 138 | 235 | 286 | 295 | 343 |
Gas import capacity | 100 | 163 | 358 | 462 | 472 | 576 |
Gas storage capacity | 100 | 112 | 113 | 109 | 119 | 110 |
Asset or capacity utilisation | 100 | 100 | 113 | 130 | 119 | 128 |
Average import capacity utilisation | 100 | 111 | 143 | 155 | 139 | 139 |
Peak import capacity utilisation | 100 | 92 | 104 | 161 | 139 | 120 |
Existing UK gas stocks as a percentage of capacity | 100 | 92 | 108 | 99 | 94 | 142 |
UK gas supply cover | 100 | 104 | 98 | 105 | 104 | 110 |
Service quality and reliability | 100 | 81 | 62 | 54 | 54 | 56 |
GB gas supply interruptions | 100 | 81 | 62 | 54 | 54 | 56 |
Asset condition | 100 | 99 | 99 | 100 | 99 | 99 |
Gas distribution leakage | 100 | 99 | 99 | 100 | 99 | 99 |