 
			 
			 
			 
			 
			 
			 
		|   | Avg   | Min   | Max   | Range   | 
|---|---|---|---|---|
| 2012 | 17.189 | 0.2 | 37.7 | 37.5 | 
| 2013 | 14.845 | -1.3 | 37.9 | 39.2 | 
| 2014 | 15.550 | -1.3 | 35.3 | 36.6 | 
| 2015 | 15.188 | -0.5 | 37.7 | 38.2 | 
| 2016 | 14.992 | 0.6 | 38.1 | 37.5 | 
| 2017 | 14.782 | -1.7 | 37.5 | 39.2 | 
| 2018 | 15.087 | -2.9 | 33.9 | 36.8 | 
| 2019 | 14.898 | 0.3 | 39.8 | 39.5 | 
| 2020 | 16.070 | 1.8 | 41.1 | 39.3 | 
| 2021 | 15.168 | -0.8 | 34.1 | 34.9 | 
| 2022 | 16.311 | 0.3 | 41.5 | 41.2 | 
| 2023 | 15.229 | -1.4 | 37.5 | 38.9 | 
| 2024 | 15.331 | 0.0 | 40.4 | 40.4 | 
| 2025 | 16.391 | 0.0 | 39.4 | 39.4 |