Zobrazení grafu: týden | měsíc | půl roku | rok | 5 let | 15 let
| Rok | Maximální | Minimální | Průměr |
|---|---|---|---|
| 2005 | 3.114 | 2.781 | 2.978 |
| 2006 | 3.047 | 2.657 | 2.833 |
| 2007 | 2.820 | 2.388 | 2.667 |
| 2008 | 2.991 | 2.119 | 2.459 |
| 2009 | 3.414 | 2.474 | 2.780 |
| 2010 | 3.178 | 2.569 | 2.822 |
| 2011 | 3.181 | 2.505 | 2.738 |
| 2012 | 3.309 | 2.926 | 3.103 |
| 2013 | 3.336 | 2.994 | 3.183 |
| 2014 | 3.676 | 3.158 | 3.368 |
| 2015 | 4.177 | 3.675 | 3.913 |
| 2016 | 3.856 | 3.585 | 3.680 |
| 2017 | 3.739 | 3.224 | 3.460 |
| 2018 | 3.494 | 3.165 | 3.288 |
| 2019 | 3.399 | 3.262 | 3.345 |