| May 06
|
Interview period: 18-22 May 2006
|
N=1008
|
| Feb 06
|
Interview period: 10-20 February 2006
|
N=652
|
| Nov 05
|
Interview period: 2-5 November 2005
|
N=1018
|
| Aug 05
|
Interview period: 10-17 August 2005
|
N=1013
|
| May 05
|
Interview period: 28 April - 11 May 2005
|
N=1005
|