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| Year | Number of living female breeding animals | Number of living male breeding animals |
|---|---|---|
| 2011 | 29 | 21 |
| 2012 | 106 | 24 |
| 2013 | 116 | 26 |
| 2015 | 16 | 4 |
| 2016 | 15 | 4 |
| 2017 | 27 | 38 |
| 2018 | 44 | 12 |
| 2019 | 27 | 6 |
| 2020 | 25 | 15 |
| 2021 | 33 | 17 |
| 2023 | 57 | 26 |
| 2024 | 73 | 36 |