| 2013-2014 | 2014-2015 | 2015-2016 | 2016-2017 | ||||
Adult | Calf | Adult | Calf | Adult | Calf | Adult | Calf | |
December | 65 | 14 | 32 | 15 | 49 | 8 | 81 | 7 |
January | 49 | 37 | 34 | 34 | 71 | 28 | 96 | 26 |
February | 19 | 50 | 21 | 35 | 37 | 47 | 48 | 48 |
March | 21 | 48 | 26 | 46 | 29 | 55 | 44 | 52 |
April | 8 | 43 | 11 | 20 | 23 | 37 | 22 | 42 |