| year | K | level | year | K | level | year | K | level |
| 2007 | 77.10 | safe | 2011 | 57.56 | warning | 2014 | 55.47 | warning |
| 2008 | 71.72 | safe | 2012 | 35.87 | warning | 2015 | 42.00 | warning |
| 2009 | 97.71 | safe | 2013 | 64.43 | safe | 2016 | 40.83 | warning |
| 2010 | 56.62 | warning |
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