No of people tested | No of episodes | No of episodes/No of people tested | 95% CI | |
---|---|---|---|---|
1998 | 122 | 11 | 9.0% | 3.9 to 14.1 |
1999 | 143 | 13 | 9.1% | 4.4 to 13.8 |
2000 | 210 | 13 | 6.2% | 2.9 to 9.4 |
2001 | 263 | 21 | 8.0% | 4.7 to 11.3 |
2002 | 294 | 20 | 6.8% | 3.9 to 9.7 |
2003 | 315 | 20 | 6.3% | 3.7 to 9.0 |
1347 | 98 | 7.3% | 5.9 to 8.7 |