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Date of Survey |
Instant/Follow-up survey |
Successful Sample |
Response Rate |
Standard Error |
19-21/3/2007 |
Follow-up survey |
1007 |
63.6% |
1.6% |
28/2/2007 |
Instant survey |
1018 |
65.2% |
1.6% |
13-17/2/2006 |
Follow-up survey |
1010 |
59.4% |
1.6% |
22/2/2006 |
Instant survey |
1026 |
68.3% |
1.6% |
11-14/4/2005 |
Follow-up survey |
1009 |
62.8% |
1.6% |
16/3/2005 |
Instant survey |
1041 |
65.2% |
1.5% |
22-24/3/2004 |
Follow-up survey |
1015 |
67.8% |
1.6% |
10/3/2004 |
Instant survey |
1023 |
64.7% |
1.6% |
12-13/3/2003 |
Follow-up survey |
1040 |
72.3% |
1.6% |
5/3/2003 |
Instant survey |
1047 |
71.4% |
1.5% |
18-20/3/2002 |
Follow-up survey |
1216 |
60.1% |
1.4% |
6/3/2002 |
Instant survey |
1041 |
59.9% |
1.5% |
30-31/3/2001 |
Follow-up survey |
511 |
73.3% |
2.2% |
7-8/3/2001 |
Instant survey |
502 |
67.1% |
2.2% |
20/3/2000 |
Follow-up survey |
660 |
56.7% |
2.0% |
8/3/2000 |
Instant survey |
856 |
56.4% |
1.7% |
18/3/1999 |
Follow-up survey |
530 |
55.4% |
2.2% |
3/3/1999 |
Instant survey |
1190 |
62.1% |
1.8% |
24/2/1998 |
Follow-up survey |
538 |
56.7% |
2.2% |
18/2/1998 |
Instant survey |
804 |
54.7% |
1.8% |