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| Working process | ||||||
|---|---|---|---|---|---|---|
| Year | 11 | 51 | 52 | 53 | Total number of accidents selected | % of all accidents recorded |
| 2005 | 306 | 20 | 29 | 7 | 362 | 36.27 |
| 2006 | 294 | 5 | 25 | 11 | 335 | 32.65 |
| 2007 | 343 | 10 | 19 | 6 | 378 | 35.42 |
| 2008 | 292 | 5 | 17 | 9 | 323 | 30.44 |
| 2009 | 220 | 1 | 10 | 3 | 234 | 28.26 |
| 2010 | 134 | 1 | 3 | 2 | 140 | 41.54 |
| 2011 | 138 | 2 | 2 | 2 | 144 | 49.28 |
| Total | 1727 | 44 | 105 | 40 | 1916 | 34.64 |
