| 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 | 111 (High) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 | 2 |
| February | 299 (Very high) | 1 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 31 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 68 (High) | 0 (Low) | 11 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 6 (Low) | 2 | 3 |
| March | 389 (Very high) | 2 (Low) | 14 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 104 (Very high) | 1 (Low) | 8 (Low) | 2 (Low) | 186 (Very high) | 1 (Low) | 23 (Medium) | 1 (Low) | 12 (Low) | 24 (Medium) | 6 | 5 |
| April | 57 (Medium) | 336 (Very high) | 35 (Medium) | 55 (High) | 17 (Low) | 13 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 47 (Medium) | 1 (Low) | 24 (Medium) | 64 (High) | 3 (Low) | 1,296 (Very high) | 45 (Medium) | 35 (Medium) | 44 (Medium) | 12 | 11 |
| May | 90 (High) | 25 (Low) | 542 (Very high) | 86 (High) | 356 (High) | 4 (Low) | 2 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 5 (Low) | 18 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 19 (Medium) | 0 (Low) | 124 (Very high) | 1 (Low) | 10 (Low) | 1,330 (Very high) | 242 (Very high) | 10 (Low) | 34 (Medium) | 40 | 15 |
| June | 124 (High) | 2 (Low) | 412 (Very high) | 41 (Medium) | 387 (High) | 2 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 4 (Low) | 22 (Medium) | 0 (Low) | 16 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 176 (Very high) | 0 (Low) | 4 (Low) | 285 (Very high) | 103 (Very high) | 2 (Low) | 21 (Medium) | 67 | 20 |
| July | 2 (Low) | 1 (Low) | 45 (Medium) | 15 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 8 (Low) | 9 (Low) | 5 (Low) | 0 (Low) | 6 (Low) | 14 | 4 |
| August | 1 (Low) | 1 (Low) | 9 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 3 | 4 |
| September | 2 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 | 2 |
| October | 35 (Medium) | 1 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 3 |
| November | 75 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 | 2 |
| December | 153 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 2 |