Australia
|
May 2012 - Aug 2012
|
6250
|
1946
|
31.1
|
18
|
97
|
55.1
|
1830
|
Postal survey (self-completion)
|
Random sampling
|
Yes
|
Belgium
|
Apr 2011 - Dec 2012
|
8821
|
3083
|
35.0
|
17
|
95
|
49.7
|
2850
|
Face-to-face interview (CAPI) and mail survey
|
Stratified two-stage random sampling and Simple random sampling
|
Yes
|
Bulgaria
|
Aug 2011 - Sep 2011
|
2275
|
1003
|
44.1
|
18
|
90
|
51.9
|
969
|
Face-to-face (PAPI) interview
|
Three stage random sampling
|
Yes
|
Chile
|
Nov 2011 - Dec 2011
|
1872
|
1559
|
83.3
|
18
|
99
|
46.5
|
1436
|
Face-to-face interview
|
Three stage random sampling
|
Yes
|
China
|
Jun 2011 - Nov 2011
|
7800
|
5620
|
72.1
|
17
|
97
|
47.8
|
5558
|
Face-to-face interview
|
Multi-stage stratified sampling
|
Yes
|
Taiwan
|
Jul 2011 - Apr 2012
|
4424
|
2199
|
49.7
|
18
|
93
|
46.8
|
2196
|
Face-to-face interview (pencil and paper & CAPI)
|
Three-stage stratified PPS sampling
|
Yes
|
Croatia
|
May 2011 - Jun 2011
|
2576
|
1210
|
47.0
|
18
|
87
|
45.6
|
1132
|
Face to face interview
|
Multistage sampling
|
No
|
Czech Republic
|
Feb 2012 - Mar 2012
|
3230
|
1804
|
55.9
|
18
|
92
|
47.4
|
1696
|
Face-to-face interview
|
Four stage stratified probability sampling
|
Yes
|
Denmark
|
Jan 2013 - Mar 2013
|
2500
|
1388
|
55.5
|
18
|
102
|
46.3
|
1364
|
Web based mail survey (self-completion)
|
Simple random sampling
|
No
|
Finland
|
Aug 2011 - Dec 2011
|
2500
|
1340
|
53.6
|
15
|
75
|
46.2
|
1309
|
Postal, paper and pencil or internet survey (self-completion)
|
Systematic sampling
|
Yes
|
France
|
Mar 2011 - Sep 2011
|
10,000
|
3319
|
33.2
|
18
|
95
|
52.1
|
3025
|
Postal survey
|
Random equal probability sampling
|
Yes
|
Germany
|
Apr 2012 - Sep 2012
|
5103
|
1681
|
32.9
|
18
|
95
|
49.5
|
1632
|
Self-completion questionnaire (CASI) and face-to-face interview (CAPI)
|
Two stage random sampling
|
No
|
Israel
|
Nov 2011 - Apr 2012
|
1594
|
1220
|
76.5
|
18
|
92
|
45.8
|
1084
|
Face to face interview
|
Four stage stratified sampling
|
No
|
Italy
|
Oct 2012 - Feb 2013
|
5062
|
1186
|
23.4
|
16
|
92
|
50.7
|
1074
|
Self-completion questionnaire (paper and pencil) was delivered by interviewer and returned by mail
|
Four stage stratified sampling
|
Yes
|
Japan
|
Nov 2011 - Dec 2011
|
1800
|
1306
|
72.6
|
16
|
100
|
50.5
|
1287
|
Self-completion
|
Two-stage stratified random sampling
|
No
|
South Korea
|
Jun 2011 - Aug 2011
|
2500
|
1535
|
61.4
|
18
|
94
|
46.0
|
1535
|
Face-to-face interview
|
Multi-stage area probability sampling
|
No
|
Lithuania
|
Nov 2011 - Dec 2011
|
3313
|
1187
|
35.8
|
18
|
87
|
47.7
|
1099
|
Face to face interview/paper and pencil interview (PAPI), with visuals
|
Multistage stratified sampling
|
Yes
|
Netherlands
|
Mar 2011 - Dec 2011
|
4500
|
1472
|
32.7
|
17
|
97
|
54.0
|
1406
|
Postal survey
|
Simple random sampling
|
Yes
|
Norway
|
Mar 2012 - Apr 2012
|
3800
|
1834
|
48.3
|
18
|
77
|
48.3
|
1789
|
Postal and web survey
|
Random sampling
|
No
|
Philippines
|
Sep 2011 - Sep 2011
|
3206
|
1200
|
37.4
|
18
|
86
|
42.9
|
1167
|
Face-to-face interviews with visuals
|
Multi-stage Probability Sampling
|
Yes
|
Poland
|
Apr 2013 - Apr 2013
|
2640
|
1115
|
42.2
|
18
|
88
|
47.8
|
1081
|
CAPI
|
Multi-stage area probability sampling
|
Yes
|
Portugal
|
Nov 2012 - Apr 2013
|
2256
|
1022
|
45.3
|
18
|
93
|
51.6
|
968
|
CAPI
|
Four stage area sampling
|
Yes
|
Russia
|
Dec 2011 - Dec 2011
|
3170
|
1511
|
47.7
|
18
|
96
|
48.1
|
1467
|
Face-to-face interviews
|
Four stage stratified probability sampling
|
Yes
|
Slovakia
|
Oct 2012 - Dec 2012
|
2544
|
1128
|
44.3
|
18
|
92
|
51.9
|
1111
|
CAPI with visuals
|
Two stage sampling
|
Yes
|
Slovenia
|
Mar 2011 - Jun 2011
|
1800
|
1082
|
60.1
|
18
|
99
|
48.6
|
1062
|
Personal interviews (pencil and paper with visuals)
|
Two-stage stratified random sampling
|
No
|
South Africa
|
Sep 2011 - Oct 2011
|
3500
|
3004
|
85.8
|
16
|
95
|
40.6
|
2757
|
Face-to-face interview
|
Multi-stage stratified sampling
|
Yes
|
Spain
|
May 2012 - Jul 2012
|
4000
|
2712
|
67.8
|
18
|
97
|
49.2
|
2622
|
Face-to-face interview
|
Two phased, stratified by clusters. Proportional random sampling
|
Yes
|
Sweden
|
Feb 2011 - May 2011
|
1966
|
1158
|
58.9
|
18
|
80
|
50.0
|
1087
|
Postal survey
|
A representative sample of the Swedish population
|
No
|
Switzerland
|
Mar 2011 - Nov 2011
|
2409
|
1212
|
50.3
|
19
|
98
|
48.9
|
1192
|
CAPI
|
Simple random sampling
|
No
|
Turkey
|
Nov 2011 - Jan 2012
|
3150
|
1559
|
49.5
|
17
|
92
|
42.1
|
1398
|
Face-to-face interview with visuals
|
Multi-stage area sampling
|
No
|
UK
|
Jul 2011 - Nov 2011
|
2260
|
936
|
41.4
|
17
|
97
|
49.7
|
897
|
Face-to-face interview and postal survey (self-completion)
|
Clustered random sampling
|
Yes
|
US
|
Mar 2012 - Sep 2012
|
2044
|
1550
|
75.8
|
20
|
89
|
50.0
|
1512
|
Face-to-face interview with CAPI
|
Multi-stage area probability sample
|
Yes
|
Total
|
Mar 2011 - Mar 2013
|
114,865
|
55,081
|
48.0
|
15
|
102
|
48.3
|
52,592
| | | |