Year | Reported number of cases | Population | Incidence (per 1000 person-years) | Rate ratio (95% CI) | |||
Boy | Girl | Boy | Girl | Boy | Girl | ||
2003 | 7837 | 3859 | 823 435 | 754 008 | 9.5 | 5.1 | 1.86 (1.79 to 1.93)* |
2004 | 7183 | 3557 | 797 949 | 728 918 | 9.0 | 4.9 | 1.84 (1.77 to 1.92)* |
2005 | 7550 | 3634 | 758 014 | 692 744 | 10.0 | 5.2 | 1.90 (1.83 to 1.98)* |
2006 | 7998 | 3898 | 705 549 | 644 624 | 11.3 | 6.0 | 1.87 (1.80 to 1.95)* |
2007 | 9053 | 4421 | 679 395 | 619 609 | 13.3 | 7.1 | 1.87 (1.80 to 1.94)* |
2008 | 9463 | 4631 | 655 736 | 598 117 | 14.4 | 7.7 | 1.86 (1.80 to 1.93)* |
2009 | 9981 | 4911 | 637 773 | 583 122 | 15.6 | 8.4 | 1.86 (1.80 to 1.92)* |
2010 | 10 968 | 5111 | 612 072 | 560 580 | 17.9 | 9.1 | 1.97 (1.90 to 2.03)* |
2011 | 9969 | 4697 | 607 034 | 557 116 | 16.4 | 8.4 | 1.95 (1.88 to 2.02)* |
2012 | 11 069 | 5122 | 619 396 | 570 641 | 17.9 | 9.0 | 1.99 (1.93 to 2.06)* |
2013 | 11 578 | 5540 | 616 451 | 569 933 | 18.8 | 9.7 | 1.93 (1.87 to 1.99)* |
2014 | 13 122 | 6207 | 622 626 | 578 076 | 21.1 | 10.7 | 1.96 (1.90 to 2.02)* |
2015 | 13 419 | 6272 | 633 460 | 588 394 | 21.2 | 10.7 | 1.99 (1.93 to 2.05)* |
2016 | 13 939 | 6672 | 654 986 | 609 219 | 21.3 | 11.0 | 1.94 (1.89 to 2.00)* |
*P<0.05.