| Date | Protections | ≤ 1 day | ≤ 1 week | ≤ 1 month | ≤ 1 year | > 1 year | Infinity | Unprotections |
|---|---|---|---|---|---|---|---|---|
| 2021 | 350 | 10 | 60 | 46 | 92 | 146 | 5 | |
| 2020 | 720 | 61 | 318 | 127 | 142 | 117 | 70 | |
| 2019 | 133 | 6 | 64 | 20 | 38 | 5 | 7 | 2 |
| 2018 | 126 | 7 | 50 | 31 | 30 | 11 | 54 | |
| 2017 | 433 | 41 | 113 | 155 | 57 | 105 | 34 | |
| 2016 | 1,200 | 132 | 457 | 479 | 16 | 162 | 32 | |
| 2015 | 530 | 6 | 81 | 42 | 2 | 17 | 23 | |
| 2014 | 512 | 11 | ||||||
| 2013 | 465 | 62 | ||||||
| 2012 | 662 | 67 | ||||||
| 2011 | 1,270 | 304 | ||||||
| 2010 | 921 | 38 | ||||||
| 2009 | 1,189 | 116 | ||||||
| 2008 | 705 | 80 | ||||||
| 2007 | 252 | 73 | ||||||
| 2006 | 278 | 178 | ||||||
| 2005 | 30 | 15 | ||||||
| 2004 | ||||||||
| 2003 | ||||||||
| 2002 |