| 2016 | Withheld (Agency reported 3 of 12 months) | Benchmark unavailable | 22.9 (126 reporting, sample year) |
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| 2017 | 9.2 | 28.2 | 21.6 (129 reporting, sample year) |
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| 2018 | Withheld (Agency reported 8 of 12 months) | Benchmark unavailable | 20.2 (126 reporting, sample year) |
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| 2019 | 10.7 | 13.5 | 18.3 (130 reporting, sample year) |
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| 2020 | 17.7 | 13.0 | 19.5 (140 reporting, sample year) |
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| 2021 | 12.7 | 35.4 | 20.9 (133 reporting, sample year) |
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| 2022 | 8.5 | 21.8 | 20.6 (121 reporting, sample year) |
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| 2023 | Withheld (Agency reported 8 of 12 months) | Benchmark unavailable | 19.6 (122 reporting, sample year) |
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| 2024 | 5.1 | 24.3 | 15.9 (135 reporting, sample year) |
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| 2025 | 11.5 | 13.9 | 13.6 (139 reporting, sample year) |
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