| | | 2004-2005 | 2005-2006 | 2006-2007 | 2007-2008 | 2008-2009 | 2009-2010 |
| | Annual incidence | | | | | | | | Number of cases/at-risk population | 1563/24404747 | 1307/24663298 | 1420/24944522 | 1395/25242310 | 1219/25564644 | 1315/25891827 | | Incidence per 100,000 persons (95% CI) | | | | | | | | Overall | 6.40
(6.09, 6.73) | 5.30
(5.02, 5.59) | 5.69
(5.40, 6.00) | 5.53
(5.24, 5.82) | 4.77
(4.51, 5.04) | 5.08
(4.81, 5.36) | | 65 years of age | 21.27
(19.72, 22.95) | 15.61
(14.30, 17.04) | 15.49
(14.20, 16.90) | 14.78
(13.53, 16.14) | 14.11
(12.90, 15.42) | 13.00
(11.86, 14.25) | | Males | 7.34
(6.87, 7.84) | 6.03
(5.61, 6.48) | 6.73
(6.29, 7.21) | 6.53
(6.09, 6.99) | 5.66
(5.26, 6.09) | 5.70
(5.30, 6.13) | | Females | 5.49
(5.09, 5.92) | 4.58
(4.22, 4.98) | 4.67
(4.31, 5.06) | 4.54
(4.19, 4.93) | 3.89
(3.56, 4.24) | 4.47
(4.12, 4.85) | | LOS, mean days ± SD | | | | | | | | Overall | 11.93 ± 17.18 | 11.07 ± 18.53 | 11.37 ± 18.51 | 11.54 ± 17.42 | 12.16 ± 17.16 | 11.31 ± 18.13 | | 0–17 years of age | 5.96 ± 8.93 | 6.45 ± 10.18 | 6.35 ± 7.20 | 5.76 ± 6.54 | 10.36 ± 18.85 | 10.18 ± 31.26 | | 18–69 years of age | 12.24 ± 17.47 | 10.56 ± 14.56 | 11.75 ± 21.32 | 11.10 ± 17.26 | 11.75 ± 14.86 | 10.59 ± 13.22 | | 70 years of age | 13.53 ± 18.46 | 13.80 ± 26.01 | 12.47 ± 14.05 | 14.87 ± 19.92 | 13.62 ± 20.49 | 13.43 ± 18.00 | | Case-fatality | | | | | | | | Number of deaths/number of cases | 134/1563 | 95/1307 | 87/1420 | 86/1395 | 83/1219 | 84/1315 | | % (95% CI) | | | | | | | | Overall | 8.6
(7.3, 10.1) | 7.3
(6.0, 8.8) | 6.1
(5.0, 7.5) | 6.2
(5.0, 7.6) | 6.8
(5.5, 8.4) | 6.4
(5.2, 7.8) | | 65 years of age | 13.7
(11.3, 16.5) | 12.7
(10.0, 15.9) | 12.7
(10.0, 15.9) | 12.2
(9.6, 15.4) | 11.8
(9.2, 15.0) | 12.0
(9.4, 15.4) | | Males | 8.9
(7.2, 11.0) | 7.6
(5.9, 9.7) | 6.1
(4.7, 8.0) | 6.5
(5.0, 8.4) | 6.4
(4.8, 8.4) | 5.6
(4.2, 7.5) | | Females | 8.1
(6.3, 10.5) | 6.8
(5.0, 9.2) | 6.1
(4.5, 8.4) | 5.7
(4.1, 7.9) | 7.4
(5.4, 10.0) | 7.4
(5.5, 9.8) |
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