Operational Performance for the nine months ended 31 March 2017

19 March 2018

	9 months ended 31 March		% change
	2017	2016

Electricity
Customers^{1, 6}	553,806	548,279	1.0%
New connections Net movement in customers²	6,505 3,753	5,855 3,766	11.1% (0.3%)
Volume distributed (GWh)³	6,219	6,273	(0.9%)
SAIDI (minutes) – 12 months to 31 March⁴
Normal operations	173.3	117.0	48.1%
Extreme events	38.8	7.8	397.4%
Total	212.1⁵	124.8	70.0%

Gas Distribution⁷
Distribution customers^{1, 6}	106,544	103,717	2.7%
New distribution connections Net movement in distribution customers²	2,749 2,222	2,486 2,152	10.6% 3.3%
Distribution volume (PJ)	10.5	10.3	1.9%

Gas Trading
Natural gas sales (PJ)⁸	13.5	12.6	7.1%
Gas liquid sales (tonnes)⁹	53,264	56,835	(6.3%)
9kg LPG bottles swapped¹⁰ Liquigas LPG tolling (tonnes)¹¹	456,658 120,126	427,723 130,912	6.8% (8.2%)

Technology
Electricity: smart meters^{1, 12}	1,242,179	1,086,508	14.3%

As at 31 March.
Net number of customers added during the period, includes disconnected, reconnected and decommissioned ICPs.
Volumes were impacted by the partial closure of a significant industrial customer in October 2015.
Regulatory year – 12 months to 31 March.
SAIDI (minutes) for the 12 months ended 31 March 2017 is an unaudited value and subject to change.
Billable ICPs.
The group’s gas transmission and non-Auckland gas distribution business (Vector Gas) was sold to First Gas on 20 April 2016. The operating statistics for the period to 31 March 2017 relate only to the Auckland network, and the prior period comparatives have been adjusted accordingly.
Excludes gas sold as gas liquids. These sales are included within the gas liquids sales tonnages.
Total of retail and wholesale LPG and natural gasoline.
Number of 9kg LPG bottles swapped and sold during the year.
Includes product tolled in Taranaki and further tolled in the South Island.
The number of smart meters deployed as at 31 March 2017 includes 90,515 meters managed but not owned by Vector (31 March 2016: 45,080).