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| Year | Samples (n) | GBS positive | |
|---|---|---|---|
| n (%) | 95% CI | ||
| 2002 | 970 | 173 (17.8) | 15.4 to 20.2 |
| 2003 | 1289 | 228 (17.7) | 15.6 to 19.8 |
| 2004 | 1448 | 246 (17.0) | 15.1 to 18.9 |
| 2005 | 1313 | 254 (19.2) | 17.2 to 21.5 |
| total | 5020 | 901 (17.9) | 16.9 to 19.0 |
