| 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 | 274 (Very high) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 88 (High) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 | 2 |
| February | 264 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 46 (Medium) | 0 (Low) | 143 (Very high) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 | 1 |
| March | 408 (Very high) | 6,733 (Very high) | 17 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 24 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 64 (High) | 50 (High) | 103 (Very high) | 33 (Medium) | 120 (Very high) | 1 (Low) | 48 (Medium) | 5 (Low) | 9 (Low) | 27 (Medium) | 8 | 29 |
| April | 45 (Medium) | 4,513 (Very high) | 46 (Medium) | 177 (Very high) | 2 (Low) | 1 (Low) | 4 (Low) | 4 (Low) | 60 (High) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 12 (Low) | 183 (Very high) | 1 (Low) | 113 (Very high) | 69 (High) | 5 (Low) | 1,130 (Very high) | 34 (Medium) | 9 (Low) | 93 (High) | 16 | 18 |
| May | 16 (Low) | 17 (Low) | 529 (Very high) | 247 (Very high) | 778 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 76 (High) | 1 (Low) | 2 (Low) | 28 (Medium) | 0 (Low) | 28 (Medium) | 2 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 355 (Very high) | 1 (Low) | 15 (Medium) | 1,118 (Very high) | 69 (High) | 5 (Low) | 14 (Low) | 87 | 27 |
| June | 6 (Low) | 3 (Low) | 41 (Medium) | 16 (Low) | 163 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 14 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 323 (Very high) | 0 (Low) | 5 (Low) | 80 (High) | 6 (Low) | 1 (Low) | 9 (Low) | 12 | 5 |
| July | 2 (Low) | 1 (Low) | 11 (Low) | 4 (Low) | 8 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 11 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 8 (Low) | 19 (Medium) | 1 (Low) | 0 (Low) | 4 (Low) | 21 | 3 |
| August | 2 (Low) | 1 (Low) | 5 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 14 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 | 1 |
| September | 5 (Low) | 9 (Low) | 3 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 23 (Medium) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 | 2 |
| October | 33 (Medium) | 8 (Low) | 1 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 | 6 |
| November | 333 (Very high) | 8 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 | 2 |
| December | 338 (Very high) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 1 |