| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 1,255 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 37 (Medium) | 0 (Low) | 23 (Medium) | 7 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 | 1 |
| February | 1,447 (Very high) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 102 (Very high) | 0 (Low) | 24 (Medium) | 1 (Low) | 81 (High) | 0 (Low) | 1 (Low) | 1 (Low) | 13 (Low) | 5 (Low) | 1 | 3 |
| March | 455 (Very high) | 72 (Medium) | 14 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 12 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 5 (Low) | 10 (Low) | 1 (Low) | 4 (Low) | 3 (Low) | 66 (High) | 1 (Low) | 10 (Low) | 1 (Low) | 11 (Low) | 14 (Low) | 2 | 2 |
| April | 56 (Medium) | 398 (Very high) | 21 (Low) | 14 (Low) | 10 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 12 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 50 (High) | 1 (Low) | 32 (Medium) | 14 (Low) | 1 (Low) | 4,620 (Very high) | 37 (Medium) | 9 (Low) | 58 (High) | 18 | 21 |
| May | 48 (Medium) | 4 (Low) | 338 (Very high) | 39 (Medium) | 411 (Very high) | 2 (Low) | 16 (Medium) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 12 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 216 (Very high) | 1 (Low) | 6 (Low) | 1,651 (Very high) | 80 (High) | 3 (Low) | 16 (Medium) | 20 | 18 |
| June | 11 (Low) | 20 (Low) | 173 (Very high) | 27 (Medium) | 18 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 25 (Medium) | 8 (Low) | 0 (Low) | 21 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 136 (Very high) | 0 (Low) | 4 (Low) | 42 (Medium) | 33 (Medium) | 2 (Low) | 14 (Low) | 24 | 9 |
| July | 3 (Low) | 2 (Low) | 105 (High) | 10 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 14 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 4 (Low) | 18 (Medium) | 5 (Low) | 1 (Low) | 6 (Low) | 10 | 5 |
| August | 2 (Low) | 1 (Low) | 7 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 10 (Low) | 22 (Medium) | 2 (Low) | 0 (Low) | 3 (Low) | 4 | 8 |
| September | 1 (Low) | 1 (Low) | 5 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 30 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 3 | 4 |
| October | 3 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 2 | 5 |
| November | 69 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 3 |
| December | 14 (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) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |