5.1 - ENERGY AUDIT
  Number of households by year of construction
1990 – 1999 2000 – 2011
An energy audit had been conducted in the dwelling
Yes 187,720 A 146,854 M
No 1,756,480 A 1,871,845 A
Don't know 87,729 M 69,479 M
Not stated U U
An energy audit had been conducted in the last 10 years
Yes 183,356 M 133,851 M
No U U
Don't know
Not stated 218,668 M 281,065 M
Changes made as a result of the audit
Yes 128,134 M U
No 59,586 M 70,228 M
Don't know
Not stated 218,668 M 281,065 M
A government grant received as part of a home energy retrofit program
Yes 76,725 M U
No 99,996 M 95,582 M
Don't know U U
Not stated 218,668 M 281,065 M

Note:

Due to rounding, the numbers may not add up and may differ slightly among tables.

Legend:

The letter beside each estimate classifies its quality as follows: A–Acceptable, M–Use with caution, U–Too unreliable to be published.

Source:

2011 Survey of Household Energy Use