| Év | Aszállyal érintett terület | |
|---|---|---|
| nagysága, ezer km2 | aránya, % | |
| 1985 | 6,0 | 6 |
| 1990 | 85,0 | 91 |
| 1995 | 40,0 | 42 |
| 1996 | 8,0 | 9 |
| 1997 | 0,0 | 0 |
| 1998 | 8,5 | 9 |
| 1999 | 0,0 | 0 |
| 2000 | 86,0 | 92 |
| 2001 | 14,7 | 16 |
| 2002 | 66,0 | 71 |
| 2003 | 88,0 | 94 |
| 2004 | 0,6 | 1 |
| 2005 | 0,0 | 0 |
| 2006 | 0,0 | 0 |
| 2007 | 79,0 | 85 |
| 2008 | 5,6 | 6 |
| 2009 | 45,0 | 48 |
| 2010 | 0,0 | 0 |
| 2011 | 35,3 | 38 |
| 2012 | 80,9 | 87 |
| 2013 | 74,5 | 80 |
| 2014 | 0,0 | 0 |
| 2015 | 83,3 | 89 |
| 2016 | 0,0 | 0 |
| 2017 | 47,4 | 51 |
| 2018 | 30,0 | 32 |
| 2019 | 31,6 | 34 |
| 2020 | 3,1 | 3 |