% prevalence* | p value† | ||
---|---|---|---|
2008 | 2017 | ||
≥ 1 | 70.20 | 69.05 | 0.002 |
≥ 2 | 47.11 | 45.57 | < 0.001 |
≥ 3 | 31.33 | 29.87 | < 0.001 |
≥ 4 | 20.61 | 19.50 | < 0.001 |
≥ 5 | 13.34 | 12.66 | < 0.001 |
≥ 6 | 8.48 | 8.14 | < 0.001 |
≥ 7 | 5.28 | 5.16 | 0.071 |
≥ 8 | 3.21 | 3.23 | 0.031 |
≥ 9 | 1.90 | 1.98 | < 0.001 |
≥ 10 | 1.10 | 1.19 | < 0.001 |
≥ 11 | 0.62 | 0.70 | < 0.001 |
≥ 12 | 0.34 | 0.40 | < 0.001 |
≥ 13 | 0.19 | 0.22 | < 0.001 |
≥ 14 | 0.10 | 0.13 | < 0.001 |
≥ 15 | 0.05 | 0.07 | < 0.001 |