| 2003 |  |  | 2005 |  |  | 2007 |  |  | 2009 |  |  | 2011 |  |  | 2015 |  |  | 2017 |  |  |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
n(a) | N(b) | % (95% CI) | n | N | % (95% CI) | n | N | % (95% CI) | n | N | % (95% CI) | n | N | % (95% CI) | n | N | % (95% CI) | n | N | % (95% CI) | |
Age | |||||||||||||||||||||
 Below median | 21 | 161 | 13.0 (8.3–19.2) | 19 | 164 | 11.6 (7.1–17.5) | 6 | 163 | 3.7 (1.4–7.8) | 4 | 167 | 2.4 (0.7–6.0) | 3 | 186 | 1.6 (0.3–4.6) | 0 | 180 | 0.0 (0.0–2.0) | 2 | 185 | 1.1 (0.1–3.9) |
 Above median | 45 | 139 | 32.4 (24.7–40.8) | 46 | 136 | 33.8 (25.9–42.4) | 20 | 137 | 14.6 (9.2–21.6) | 13 | 133 | 9.8 (5.3–16.1) | 13 | 159 | 8.2 (4.4–13.6) | 9 | 165 | 5.5 (2.5–10.1) | 15 | 160 | 9.4 (5.3–15.0) |
Educational achievement | |||||||||||||||||||||
 Primary or lower | 20 | 100 | 20.0 (12.7–29.2) | 28 | 114 | 24.6 (17.0–33.5) | 14 | 94 | 14.9 (8.4–23.7) | 11 | 90 | 12.2 (6.3–20.8) | 5 | 62 | 8.1 (2.7–17.8) | 3 | 62 | 4.8 (1.0–13.5) | 4 | 49 | 8.2 (2.3–19.6) |
 Secondary or higher | 46 | 200 | 23.0 (17.4–29.5) | 37 | 186 | 19.9 (14.4–26.4) | 12 | 206 | 5.8 (3.0–10.0) | 6 | 210 | 2.9 (1.1–6.1) | 11 | 283 | 3.9 (2.0–6.8) | 6 | 283 | 2.1 (0.8–4.6) | 13 | 296 | 4.4 (2.4–7.4) |
Marital status | |||||||||||||||||||||
 Married | 39 | 218 | 17.9 (13.0–23.6) | 39 | 213 | 18.3 (13.4–24.2) | 10 | 105 | 9.5 (4.7–16.8) | 6 | 96 | 6.3 (2.3–13.1) | 6 | 100 | 6.0 (2.2–12.6) | 8 | 109 | 7.3 (3.2–14.0) | 11 | 129 | 8.5 (4.3–14.7) |
 Not married | 27 | 82 | 32.9 (22.9–44.2) | 26 | 87 | 29.9 (20.5–40.6) | 16 | 195 | 8.2 (4.8–13.0) | 11 | 204 | 5.4 (2.7–9.4) | 10 | 245 | 4.1 (2.0–7.4) | 1 | 236 | 0.4 (0.0–2.3) | 6 | 216 | 2.8 (1.0–5.9) |
Living with sexual partner | |||||||||||||||||||||
 Yes | 23 | 80 | 28.8 (19.2–40.0) | 25 | 85 | 29.4 (20.0–40.3) | 8 | 99 | 8.1 (3.6–15.3) | 5 | 88 | 5.7 (1.9–12.8) | 6 | 96 | 6.3 (2.3–13.1) | 5 | 83 | 6.0 (2.0–13.5) | 5 | 61 | 8.2 (2.7–18.1) |
 No | 39 | 220 | 17.7 (12.9–23.4) | 40 | 215 | 18.6 (13.6–24.5) | 18 | 201 | 9.0 (5.4–13.8) | 12 | 212 | 5.7 (3.0–9.7) | 10 | 249 | 4.0 (1.9–7.3) | 4 | 262 | 1.5 (0.4–3.9) | 12 | 284 | 4.2 (2.2–7.3) |
Total | 66 | 300 | 22.0 (17.4–27.1) | 65 | 300 | 21.7 (17.1–26.7) | 26 | 300 | 8.7 (5.7–12.4) | 17 | 300 | 5.7 (3.3–8.9) | 16 | 345 | 11.3 (2.7–7.4) | 9 | 345 | 2.6 (1.2–4.9) | 17 | 345 | 4.9 (2.9–7.8) |