| Date of Survey |
Successful Sample |
Response Rate |
Standard Error |
| 27-30/3/2012 |
1019 |
63.4% |
1.6% |
| 22-26/2/2007 |
1014 |
60.2% |
1.6% |
| 12-14/2/2007 |
1013 |
63.5% |
1.6% |
| 2-7/2/2007 |
1011 |
63.6% |
1.6% |
| 20-23/6/2005 |
1026 |
61.9% |
1.6% |
| 6-8/6/2005 |
1029 |
66.0% |
1.6% |
| 1-3/6/2005 |
1015 |
65.6% |
1.6% |
| 11/12/1996 |
1301 |
65.3% |
1.4% |
| 9/12/1996 |
563 |
50.3% |
2.1% |
| 2/12/1996 |
565 |
57.1% |
2.1% |
| 25-26/11/1996 |
817 |
50.3% |
1.7% |
| 18-19/11/1996 |
531 |
47.9% |
2.2% |
| 11/11/1996 |
576 |
46.4% |
2.1% |
| 5-6/11/1996 |
522 |
46.0% |
2.2% |
| 23-24/10/1996 |
526 |
46.5% |
2.2% |
| 8/10/1996 |
521 |
43.9% |
2.2% |
| 29-31/8/1996 |
524 |
56.2% |
2.2% |