| 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 | 269 (Very high) | 1 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 37 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 2 |
| February | 696 (Very high) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 29 (Medium) | 0 (Low) | 102 (Very high) | 2 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 | 3 |
| March | 84 (Medium) | 304 (Very high) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 5 (Low) | 51 (High) | 3 (Low) | 137 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 | 1 |
| April | 4 (Low) | 750 (Very high) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 2 (Low) | 3 (Low) | 11 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 6 (Low) | 1 | 2 |
| May | 6 (Low) | 7 (Low) | 252 (Very high) | 27 (Medium) | 85 (Medium) | 2 (Low) | 51 (High) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 159 (Very high) | 1 (Low) | 2 (Low) | 403 (Very high) | 27 (Medium) | 2 (Low) | 10 (Low) | 33 | 3 |
| June | 6 (Low) | 22 (Low) | 68 (Medium) | 16 (Low) | 196 (Medium) | 1 (Low) | 20 (Medium) | 2 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 94 (High) | 1 (Low) | 6 (Low) | 249 (Very high) | 10 (Low) | 1 (Low) | 15 (Medium) | 29 | 6 |
| July | 2 (Low) | 6 (Low) | 19 (Low) | 6 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 24 (Medium) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 15 (Medium) | 1 (Low) | 3 (Low) | 31 (Medium) | 3 (Low) | 2 (Low) | 10 (Low) | 7 | 2 |
| August | 2 (Low) | 2 (Low) | 6 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 6 (Low) | 15 (Medium) | 1 (Low) | 0 (Low) | 2 (Low) | 6 | 2 |
| September | 2 (Low) | 3 (Low) | 7 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 11 (Low) | 16 (Medium) | 8 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 2 | 2 |
| October | 5 (Low) | 4 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 1 |
| November | 10 (Low) | 2 (Low) | 1 (Low) | 1 (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) | 6 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 0 |
| December | 151 (High) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 | 1 |