| 2016 | 43.2 | Benchmark unavailable | 22.9 (126 reporting, sample year) |
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| 2017 | 28.5 | Benchmark unavailable | 21.6 (129 reporting, sample year) |
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| 2018 | 34.9 | 21.7 | 20.2 (126 reporting, sample year) |
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| 2019 | 25.4 | 14.5 | 18.3 (130 reporting, sample year) |
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| 2020 | 27.3 | 14.3 | 19.5 (140 reporting, sample year) |
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| 2021 | 27.5 | Benchmark unavailable | 20.9 (133 reporting, sample year) |
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| 2022 | 20.1 | 10.5 | 20.6 (121 reporting, sample year) |
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| 2023 | 30.9 | 11.4 | 19.6 (122 reporting, sample year) |
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| 2024 | 35.7 | 11.1 | 15.9 (135 reporting, sample year) |
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| 2025 | 26.2 | 12.9 | 13.6 (139 reporting, sample year) |
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