| 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 | 1,225 (Very high) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 53 (High) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 2 |
| February | 1,557 (Very high) | 0 (Low) | 16 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 30 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 56 (High) | 0 (Low) | 336 (Very high) | 1 (Low) | 66 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 7 (Low) | 1 | 1 |
| March | 239 (Very high) | 1,483 (Very high) | 9 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 31 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 15 (Medium) | 12 (Low) | 24 (Medium) | 3 (Low) | 136 (Very high) | 1 (Low) | 8 (Low) | 2 (Low) | 6 (Low) | 14 (Low) | 5 | 2 |
| April | 10 (Low) | 2,706 (Very high) | 12 (Low) | 10 (Low) | 7 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 318 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 130 (Very high) | 2 (Low) | 26 (Medium) | 13 (Low) | 3 (Low) | 351 (Very high) | 8 (Low) | 9 (Low) | 8 (Low) | 18 | 3 |
| May | 12 (Low) | 7 (Low) | 90 (High) | 31 (Medium) | 267 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 6 (Low) | 895 (Very high) | 16 (Medium) | 7 (Low) | 9 (Low) | 6 | 4 |
| June | 6 (Low) | 5 (Low) | 187 (Very high) | 35 (Medium) | 19 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 30 (Medium) | 10 (Low) | 0 (Low) | 4 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 11 (Low) | 29 (Medium) | 38 (Medium) | 1 (Low) | 15 (Medium) | 23 | 3 |
| July | 7 (Low) | 8 (Low) | 97 (High) | 11 (Low) | 6 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 19 (Medium) | 8 (Low) | 0 (Low) | 1 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 10 (Low) | 15 (Medium) | 4 (Low) | 0 (Low) | 5 (Low) | 76 | 3 |
| August | 3 (Low) | 3 (Low) | 13 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 10 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 29 | 1 |
| September | 3 (Low) | 5 (Low) | 5 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 32 (Medium) | 6 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 2 |
| October | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| November | 5 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| December | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |