| 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 | 102 | 5.04 | 7.38 | 10.61 | 1.40 | 2.01 | 2.78 | |||||||||
| 2008 | 101 | 2.79 | 3.84 | 5.18 | 0.76 | 1.08 | 1.44 | 2008 | 102 | 7.61 | 10.54 | 14.48 | 2.42 | 3.20 | 4.16 | ||||
| 2009 | 107 | 0.94 | 1.24 | 1.58 | 0.32 | 0.42 | 0.52 | 2009 | 107 | 12.57 | 16.31 | 21.09 | 2.50 | 3.14 | 3.90 | ||||
| 2010 | 102 | 0.43 | 0.73 | 1.09 | 0.12 | 0.28 | 0.48 | 2010 | 102 | 7.44 | 10.37 | 14.32 | 1.92 | 2.63 | 3.51 | ||||
| 2011 | 102 | 1.35 | 1.90 | 2.57 | 0.37 | 0.52 | 0.69 | 2011 | 102 | 15.00 | 20.35 | 27.49 | 3.26 | 4.24 | 5.44 | ||||
| 2012 | 102 | 5.48 | 7.32 | 9.68 | 1.16 | 1.50 | 1.90 | 2012 | 102 | 15.52 | 20.82 | 27.81 | 3.12 | 4.04 | 5.16 | ||||
| 2013 | 102 | 4.09 | 5.08 | 6.26 | 0.83 | 1.01 | 1.20 | 2013 | 102 | 6.45 | 8.85 | 12.01 | 1.70 | 2.27 | 2.95 | ||||
| 2014 | 102 | 0.52 | 0.74 | 1.01 | 0.14 | 0.23 | 0.32 | 2014 | 102 | 7.70 | 10.47 | 14.13 | 2.06 | 2.71 | 3.49 | ||||
| 2015 | 102 | 0.86 | 1.16 | 1.50 | 0.26 | 0.35 | 0.46 | 2015 | 102 | 11.83 | 15.94 | 21.36 | 2.77 | 3.51 | 4.41 | ||||
| 2016 | 102 | 2.24 | 2.88 | 3.65 | 0.61 | 0.78 | 0.98 | 2016 | 102 | 16.25 | 22.55 | 31.16 | 4.01 | 5.34 | 7.02 | ||||
| 2017 | 15 | 0.62 | 1.12 | 1.77 | 0.11 | 0.21 | 0.31 | 2017 | 102 | 11.18 | 15.43 | 21.17 | 2.46 | 3.27 | 4.27 | ||||
| 2018 | 102 | 2.57 | 3.24 | 4.03 | 0.58 | 0.73 | 0.89 | 2018 | 102 | 15.08 | 21.70 | 31.03 | 3.19 | 4.29 | 5.68 | ||||
| 2019 | 101 | 3.27 | 4.34 | 5.68 | 0.72 | 0.94 | 1.18 | 2019 | 102 | 13.02 | 16.86 | 21.76 | 2.51 | 3.15 | 3.91 | ||||
| 2020 | 2020 | 102 | 36.21 | 47.38 | 61.91 | 5.75 | 7.20 | 8.96 | |||||||||||
| 2021 | 102 | 2.81 | 3.90 | 5.30 | 0.66 | 0.91 | 1.20 | 2021 | 102 | 18.57 | 26.35 | 37.23 | 3.54 | 4.79 | 6.39 | ||||
| 2022 | 102 | 3.33 | 4.35 | 5.62 | 0.82 | 1.07 | 1.36 | 2022 | 102 | 19.34 | 25.27 | 32.94 | 3.33 | 4.19 | 5.22 | ||||
| 2023 | 2023 | ||||||||||||||||||
| 2024 | 2024 | ||||||||||||||||||
| 2025 | 2025 | ||||||||||||||||||