| Spring Survey | Fall Survey | ||||||||||||||||||
| Age | Year | n | Numerical Index | Biomass Index | Age | Year | n | Numerical Index | Biomass Index | ||||||||||
| LCI | Index | UCI | LCI | Index | UCI | LCI | Index | UCI | LCI | Index | UCI | ||||||||
| All | 2007 | All | 2007 | 150 | 121.1 | 147.9 | 180.6 | 4.2 | 5.0 | 5.9 | |||||||||
| 2008 | 107 | 46.7 | 61.7 | 81.5 | 2.8 | 3.5 | 4.2 | 2008 | 150 | 37.2 | 47.7 | 61.0 | 2.4 | 2.8 | 3.3 | ||||
| 2009 | 109 | 28.0 | 36.2 | 46.7 | 1.7 | 2.1 | 2.6 | 2009 | 160 | 76.9 | 98.1 | 125.0 | 4.3 | 5.0 | 5.8 | ||||
| 2010 | 108 | 5.4 | 7.4 | 10.1 | 0.5 | 0.7 | 1.0 | 2010 | 150 | 26.4 | 33.6 | 42.6 | 2.6 | 3.1 | 3.6 | ||||
| 2011 | 108 | 19.5 | 27.0 | 37.4 | 1.2 | 1.5 | 1.9 | 2011 | 150 | 35.5 | 42.9 | 51.8 | 2.5 | 2.8 | 3.2 | ||||
| 2012 | 108 | 92.8 | 127.8 | 175.8 | 4.0 | 5.0 | 6.3 | 2012 | 150 | 39.7 | 49.5 | 61.6 | 2.5 | 2.9 | 3.4 | ||||
| 2013 | 107 | 4.3 | 5.5 | 7.0 | 0.4 | 0.5 | 0.6 | 2013 | 150 | 71.4 | 90.8 | 115.5 | 4.4 | 5.2 | 6.2 | ||||
| 2014 | 107 | 9.4 | 12.8 | 17.3 | 1.1 | 1.4 | 1.7 | 2014 | 150 | 189.9 | 242.5 | 309.6 | 9.1 | 10.7 | 12.6 | ||||
| 2015 | 108 | 10.5 | 14.6 | 20.4 | 0.9 | 1.2 | 1.5 | 2015 | 150 | 84.1 | 99.8 | 118.4 | 6.3 | 7.2 | 8.3 | ||||
| 2016 | 108 | 17.1 | 24.8 | 35.7 | 1.6 | 2.1 | 2.7 | 2016 | 150 | 64.3 | 81.0 | 102.1 | 4.3 | 5.0 | 5.8 | ||||
| 2017 | 49 | 242.8 | 331.6 | 452.8 | 5.2 | 7.0 | 9.2 | 2017 | 150 | 47.3 | 58.0 | 71.1 | 3.4 | 3.9 | 4.4 | ||||
| 2018 | 108 | 42.6 | 55.8 | 73.0 | 2.5 | 3.0 | 3.6 | 2018 | 150 | 59.7 | 75.4 | 95.2 | 5.1 | 5.9 | 6.9 | ||||
| 2019 | 107 | 117.8 | 148.8 | 188.1 | 3.8 | 4.6 | 5.5 | 2019 | 150 | 35.2 | 43.5 | 53.8 | 2.2 | 2.6 | 3.1 | ||||
| 2020 | 2020 | 150 | 55.8 | 68.3 | 83.6 | 3.8 | 4.4 | 5.1 | |||||||||||
| 2021 | 108 | 89.8 | 112.3 | 140.3 | 2.6 | 3.2 | 3.8 | 2021 | 150 | 114.8 | 137.0 | 163.5 | 6.3 | 7.3 | 8.5 | ||||
| 2022 | 108 | 47.0 | 57.2 | 69.7 | 2.4 | 2.9 | 3.5 | 2022 | 150 | 87.7 | 105.7 | 127.3 | 4.8 | 5.5 | 6.3 | ||||
| 2023 | 2023 | ||||||||||||||||||
| 2024 | 2024 | ||||||||||||||||||
| 2025 | 2025 | ||||||||||||||||||