| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 23 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |
| February | 457 (Very high) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 66 (High) | 3 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 |
| March | 86 (Medium) | 1,294 (Very high) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 13 (Low) | 9 (Low) | 25 (Medium) | 86 (High) | 1 (Low) | 17 (Medium) | 3 (Low) | 0 (Low) | 15 (Medium) | 31 |
| April | 11 (Low) | 480 (Very high) | 26 (Low) | 21 (Medium) | 10 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 39 (Medium) | 1 (Low) | 22 (Medium) | 7 (Low) | 3 (Low) | 666 (Very high) | 20 (Medium) | 1 (Low) | 27 (Medium) | 27 |
| May | 13 (Low) | 4 (Low) | 181 (Very high) | 41 (Medium) | 57 (Medium) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 36 (Medium) | 0 (Low) | 4 (Low) | 386 (Very high) | 48 (Medium) | 1 (Low) | 12 (Low) | 30 |
| June | 2 (Low) | 3 (Low) | 24 (Low) | 4 (Low) | 55 (Medium) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 8 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 13 |
| July | 2 (Low) | 1 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 15 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 7 |
| August | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 7 |
| September | 1 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 |
| October | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 |
| November | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 |
| December | 13 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 |