| 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 | 800 (Very high) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 42 (Medium) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 244 (Very high) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 6 (Low) | 3 | 7 |
| February | 161 (High) | 1 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 46 (Medium) | 0 (Low) | 28 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 | 7 |
| March | 772 (Very high) | 3,079 (Very high) | 12 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 12 (Low) | 16 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 70 (High) | 1 (Low) | 27 (Medium) | 8 (Low) | 126 (Very high) | 1 (Low) | 1 (Low) | 1 (Low) | 12 (Low) | 16 (Medium) | 29 | 10 |
| April | 19 (Low) | 636 (Very high) | 28 (Low) | 93 (High) | 4 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 32 (Medium) | 1 (Low) | 49 (Medium) | 174 (Very high) | 4 (Low) | 1,546 (Very high) | 24 (Medium) | 12 (Low) | 21 (Medium) | 44 | 22 |
| May | 29 (Low) | 35 (Medium) | 271 (Very high) | 131 (Very high) | 401 (Very high) | 1 (Low) | 3 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 0 (Low) | 25 (Medium) | 1 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 639 (Very high) | 1 (Low) | 14 (Low) | 2,504 (Very high) | 70 (High) | 8 (Low) | 11 (Low) | 39 | 34 |
| June | 11 (Low) | 2 (Low) | 54 (Medium) | 16 (Low) | 134 (Medium) | 1 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 30 (Medium) | 6 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 127 (Very high) | 0 (Low) | 6 (Low) | 163 (Very high) | 13 (Low) | 0 (Low) | 10 (Low) | 14 | 24 |
| July | 2 (Low) | 1 (Low) | 21 (Low) | 9 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 15 (Medium) | 3 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 10 (Low) | 9 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 9 | 16 |
| August | 2 (Low) | 0 (Low) | 5 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 13 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 4 | 13 |
| September | 4 (Low) | 1 (Low) | 7 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 19 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 | 9 |
| October | 38 (Medium) | 1 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 | 3 |
| November | 289 (Very high) | 1 (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) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 2 | 4 |
| December | 620 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 3 | 5 |