The information is intended to provide an indication of chronic hepatitis B carriage, based on testing results in antenatal serum specimens received during the designated year.
| Year | Age group (years) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| <20 | 20-24 | 25-29 | 30-34 | >34 | ||||||
| No. tested |
% | No. tested |
% | No. tested |
% | No. tested |
% | No. tested |
% | |
| 2001 | 659 | 7.3 | 3516 | 9.5 | 8330 | 10.1 | 6936 | 8.3 | 3915 | 9 |
| 2002 | 484 | 5 | 2829 | 9.7 | 9120 | 9.7 | 6351 | 8.5 | 3414 | 8.1 |
| 2003 | 548 | 4.9 | 2880 | 9.9 | 7614 | 9.4 | 6789 | 8.3 | 3602 | 8.2 |
| 2004 | 510 | 6.1 | 2854 | 8.4 | 7161 | 8.9 | 7732 | 8.6 | 3856 | 8.1 |
| 2005 | 445 | 3.4 | 2753 | 8.9 | 6063 | 9.5 | 7869 | 8.6 | 4114 | 7.4 |
| 2006 | 516 | 4.8 | 2590 | 8 | 6271 | 8.7 | 8637 | 8.6 | 4514 | 8.4 |
| 2007 | 520 | 4 | 2929 | 8.4 | 7301 | 9.3 | 10232 | 8.7 | 5551 | 7.5 |
| 2008 | 533 | 3.2 | 2968 | 8 | 7652 | 8.6 | 10354 | 8.8 | 5838 | 8 |
| 2009 | 434 | 3.2 | 2830 | 8.7 | 7444 | 9.3 | 10156 | 7.9 | 6071 | 7.7 |
| 2010 | 446 | 2.2 | 2903 | 8 | 7817 | 8.5 | 10211 | 7.9 | 6385 | 7.6 |
| 2011 | 447 | 2.5 | 2898 | 6.5 | 9010 | 8.1 | 12273 | 7.3 | 7552 | 7.5 |
| 2012 | 463 | 2.6 | 2467 | 4.4 | 8161 | 7.5 | 12664 | 7.2 | 7437 | 7.1 |
| 2013 | 423 | 5 | 2237 | 4.1 | 7526 | 6.8 | 12466 | 6.7 | 7168 | 7.3 |
| 2014 | 366 | 0.8 | 2252 | 2.8 | 7901 | 6.3 | 13488 | 6.4 | 7692 | 6.9 |
| 2015 | 409 | 1 | 2439 | 2.6 | 8589 | 4.7 | 14434 | 6.2 | 8656 | 6.8 |
| 2016 | 328 | 2.1 | 2123 | 2 | 7580 | 4.1 | 13018 | 5.7 | 7923 | 6.6 |
| 2017 | 274 | 0.7 | 1897 | 2.2 | 6624 | 3.5 | 11476 | 5.5 | 7611 | 6.3 |
| 2018 | 233 | 1.3 | 1698 | 1.2 | 6376 | 2.9 | 11647 | 4.6 | 8026 | 6.3 |
| 2019 | 193 | 0.5 | 1474 | 1.6 | 5948 | 2.4 | 11333 | 3.7 | 7743 | 6.2 |
| 2020 | 162 | 1.9 | 1031 | 1.1 | 4394 | 2.0 | 9291 | 3.5 | 6301 | 4.7 |
| 2021 | 116 | 0.9 | 811 | 0.6 | 3960 | 1.3 | 8586 | 2.5 | 6228 | 4.2 |
| 2022 | 102 | 1.5 | 644 | 0.9 | 3266 | 1.6 | 7468 | 1.8 | 5357 | 4.2 |
| 2023 | 69 | 1.5 | 636 | 1.3 | 3314 | 1.2 | 8004 | 2.0 | 5937 | 3.9 |
| 2024 | 81 | 0.0 | 594 | 0.7 | 3134 | 1.3 | 7631 | 1.7 | 6035 | 3.8 |
| 2025 | 51 | 0.0 | 456 | 0.4 | 2225 | 1.0 | 5981 | 1.4 | 5199 | 3.1 |