Number of children in BHVQ and proportion of all children in Sweden according to Statistics Sweden (31 December 2021)
| Birth cohort | Total amount of children in the BHVQ N | Percentage of children in Sweden in BHVQ |
| 2011 | 73 | 0 |
| 2012 | 530 | 0 |
| 2013 | 1335 | 1 |
| 2014 | 3623 | 3 |
| 2015 | 4984 | 4 |
| 2016 | 6785 | 5 |
| 2017 | 14 713 | 12 |
| 2018 | 15 471 | 13 |
| 2019 | 14 906 | 13 |
| 2020 | 16 701 | 15 |
| 2021 | 17 810 | 16 |
| 2022 | 14 206 | No denominator available for this birth cohort |
| Total | 111 137 |
BHVQ, The Swedish Child Health Services Register.