Total babies named Birkley (all years): 71
| Year | Girls (count / rank / %) |
|---|---|
| 2024 | 14 / #7632 / 0.001% |
| 2023 | 7 / #12357 / 0.000% |
| 2022 | 7 / #12452 / 0.000% |
| 2021 | 6 / #13761 / 0.000% |
| 2020 | 9 / #10382 / 0.001% |
| 2019 | 6 / #14105 / 0.000% |
| 2014 | 6 / #14875 / 0.000% |
| 2012 | 5 / #17316 / 0.000% |
| 2011 | 6 / #15136 / 0.000% |
| 2010 | 5 / #17447 / 0.000% |