Zobrazení grafu: týden | měsíc | půl roku | rok | 5 let | 15 let
| Rok | Maximální | Minimální | Průměr |
|---|---|---|---|
| 1991 | 53.860 | 50.300 | 52.008 |
| 1992 | 53.410 | 43.296 | 49.899 |
| 1993 | 45.092 | 41.172 | 43.772 |
| 1994 | 45.219 | 42.972 | 44.032 |
| 1995 | 43.928 | 40.649 | 41.884 |
| 1996 | 46.172 | 40.526 | 42.366 |
| 1997 | 59.313 | 44.384 | 51.958 |
| 1998 | 58.545 | 47.824 | 53.467 |
| 1999 | 58.484 | 48.940 | 55.925 |
| 2000 | 63.688 | 55.850 | 58.432 |
| 2001 | 57.050 | 50.794 | 54.770 |
| 2002 | 52.701 | 45.034 | 49.028 |
| 2003 | 48.594 | 43.419 | 46.055 |
| 2004 | 49.771 | 42.888 | 47.035 |
| 2005 | 45.190 | 42.129 | 43.544 |
| 2006 | 42.514 | 40.747 | 41.568 |
| 2007 | 42.858 | 36.126 | 40.576 |
| 2008 | 36.294 | 27.051 | 31.411 |
| 2009 | 33.303 | 27.412 | 29.641 |
| 2010 | 31.781 | 27.461 | 29.497 |
| 2011 | 30.997 | 26.865 | 28.339 |
| 2012 | 32.856 | 29.268 | 31.012 |
| 2013 | 33.200 | 29.052 | 30.616 |
| 2014 | 35.587 | 32.698 | 34.154 |
| 2015 | 38.841 | 35.315 | 37.566 |
| 2016 | 36.892 | 29.862 | 33.147 |
| 2017 | 32.168 | 28.118 | 30.084 |
| 2018 | 29.861 | 28.365 | 28.992 |
| 2019 | 30.311 | 28.345 | 29.481 |