| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive |
|---|---|---|---|---|---|
| January | 651 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) |
| February | 3,004 (Very high) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) |
| March | 132 (High) | 768 (Very high) | 10 (Low) | 11 (Low) | 0 (Low) |
| April | 23 (Low) | 1,076 (Very high) | 23 (Low) | 12 (Low) | 10 (Low) |
| May | 21 (Low) | 2 (Low) | 175 (Very high) | 19 (Low) | 549 (Very high) |
| June | 7 (Low) | 0 (Low) | 108 (High) | 22 (Medium) | 87 (Medium) |
| July | 2 (Low) | 1 (Low) | 21 (Low) | 3 (Low) | 3 (Low) |
| August | 1 (Low) | 2 (Low) | 4 (Low) | 2 (Low) | 3 (Low) |
| September | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) |
| October | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) |
| November | 14 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) |
| December | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) |