| Survey year | No. of resident examined | No. (%) of resident infected by the helminth sp.* | ||||
|---|---|---|---|---|---|---|
| Cs | Het | Tt | Gs | Etc. | ||
| 2011 | 27,395 | 3,049 (11.1) | 753 (2.7) | 107 (0.4) | 4 (0.01) | 4 (0.01) |
| 2012 | 23,233 | 1,867 (8.0) | 329 (1.4) | 49 (0.2) | 29 (0.12) | 4 (0.02) |
| 2013 | 38,789 | 2,950 (7.6) | 622 (1.6) | 69 (0.2) | 42 (0.11) | 9 (0.02) |
| 2014 | 41,139 | 2,029 (4.9) | 555 (1.3) | 86 (0.2) | 6 (0.01) | 6 (0.01) |
| 2015 | 42,024 | 1,778 (4.2) | 334 (0.8) | 69 (0.2) | 6 (0.01) | 7 (0.02) |
| 2016 | 34,943 | 1,419 (4.1) | 358 (1.0) | 44 (0.1) | 18 (0.05) | 1 (0.003) |
| 2017 | 38,648 | 1,524 (3.9) | 319 (0.8) | 52 (0.1) | 28 (0.07) | 3 (0.01) |
| 2018 | 32,792 | 1,351 (4.1) | 677 (2.1) | 63 (0.2) | 22 (0.07) | 6 (0.02) |
| 2019 | 30,415 | 944 (3.1) | 505 (1.7) | 58 (0.2) | 21 (0.07) | – |
| 2020 | 25,642 | 974 (3.8) | 440 (1.7) | 54 (0.2) | 33 (0.13) | 1 (0.004) |
| 2021 | 24,349 | 697 (3.3) | 340 (1.6) | 64 (0.3) | 12 (0.05) | 4 (0.01) |
| 2022 | 28,902 | 950 (3.3) | 506 (1.8) | 43 (0.2) | 26 (0.10) | 2 (0.01) |
| 2023 | 25,214 | 463 (1.8) | 391 (1.6) | 33 (0.1) | 11 (0.04) | 4 (0.02) |
| Total | 413,485 | 19,995 (4.8) | 6,129 (1.5) | 791 (0.2) | 258 (0.06) | 51 (0.01) |