| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive |
|---|---|---|---|---|---|
| January | 478 (Very high) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) |
| February | 241 (Very high) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) |
| March | 137 (High) | 1,031 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) |
| April | 7 (Low) | 786 (Very high) | 2 (Low) | 22 (Medium) | 3 (Low) |
| May | 1 (Low) | 2 (Low) | 37 (Medium) | 11 (Low) | 42 (Low) |
| June | 2 (Low) | 0 (Low) | 30 (Medium) | 11 (Low) | 27 (Low) |
| July | 2 (Low) | 1 (Low) | 47 (Medium) | 3 (Low) | 2 (Low) |
| August | 1 (Low) | 1 (Low) | 8 (Low) | 2 (Low) | 3 (Low) |
| September | 1 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) |
| October | 2 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) |
| November | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) |
| December | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) |