R_FERTILITY = (BIRTH_TOT:total * 1000.0) / AGE_FERTILE:female/F
| Data Role | Period Covered | Authority | Source | Details | Method |
|---|---|---|---|---|---|
| BIRTH_TOT:total | 1861 to 2021 | GBHGIS | Great Britain Historical GIS Project | Great Britain Historical GIS Project | Exact count provided by a government statistical office for this area |
Live births per thousand women aged 20 to 49. The General Fertility Rate is usually defined relative to the number of women aged 15 to 49, but in Britain the ages 20 to 49 are generally more appropriate.