| 2016 | 2.0 | Benchmark unavailable | 2.4 (145 reporting, sample year) |
|---|
| 2017 | 1.9 | Benchmark unavailable | 2.2 (145 reporting, sample year) |
|---|
| 2018 | 1.9 | Benchmark unavailable | 2.2 (152 reporting, sample year) |
|---|
| 2019 | 1.9 | Benchmark unavailable | 2.2 (153 reporting, sample year) |
|---|
| 2020 | 0.0 | Benchmark unavailable | 2.2 (153 reporting, sample year) |
|---|
| 2021 | 0.0 | Benchmark unavailable | 2.3 (155 reporting, sample year) |
|---|
| 2022 | 0.0 | Benchmark unavailable | 1.9 (155 reporting, sample year) |
|---|
| 2023 | 0.0 | Benchmark unavailable | 2.3 (155 reporting, sample year) |
|---|
| 2024 | 0.0 | Benchmark unavailable | 2.4 (155 reporting, sample year) |
|---|
| 2025 | 0.0 | Benchmark unavailable | 2.5 (143 reporting, sample year) |
|---|