حالات الدفتريا المُبلغ عنها (العدد)
| 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
| بلجيكا | 0 | | 0 | 0 | 0 | 1 | 1 | 0 | 2 | 6 | 3 | 2 | 6 | 3 | 3 | 31 | 14 | 14 |
| هولندا | 0 | 0 | 0 | | 1 | 1 | 0 | 0 | 5 | 3 | 2 | 4 | 0 | 3 | 0 | 7 | 14 | 3 |
| لوكسمبورج | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 0 | 0 | 0 | 0 | | 0 | 1 | 0 | 2 | 0 |