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The number of clean, healthy, unhealthy days for sensitive, unhealthy, very unhealthy, and dangerous groups in 2005-2014
| Year | Clean | Healthy | Unhealthy for sensitive groups | Unhealthy | Very unhealthy | Dangerous |
|---|---|---|---|---|---|---|
| 2005 | 23 | 250 8 | 8 | 4 | - | - |
| 2006 | 28 | 268 6 | 9 | - | - | - |
| 2007 | 33 | 317 1 | 5 | - | - | - |
| 2008 | 9 | 290 6 | 4 | 2 | 1 | - |
| 2009 | 26 | 300 3 | 3 | 4 | 1 | 1 |
| 2010 | 26 | 263 5 | 6 | 19 | 1 | - |
| 2011 | 7 | 149 19 | 7 | 9 | 3 | - |
| 2012 | 2 | 216 13 | 4 | 13 | 1 | - |
| 2013 | 5 | 209 14 | 0 | 11 | - | - |
| 2014 | 13 | 220 12 | 6 | 6 | - | - |
