| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 41 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |
| February | 281 (Very high) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 34 (Medium) | 5 (Low) | 307 (Very high) | 1 (Low) | 205 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 12 (Low) | 9 |
| March | 260 (Very high) | 780 (Very high) | 12 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 204 (Very high) | 14 (Low) | 17 (Medium) | 112 (Very high) | 0 (Low) | 26 (Medium) | 2 (Low) | 16 (Medium) | 10 (Low) | 1,097 |
| April | 3 (Low) | 35 (Medium) | 16 (Low) | 19 (Low) | 4 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 56 (High) | 2 (Low) | 20 (Medium) | 1 (Low) | 1 (Low) | 150 (Very high) | 8 (Low) | 6 (Low) | 12 (Low) | 197 |
| May | 4 (Low) | 5 (Low) | 189 (Very high) | 36 (Medium) | 100 (Medium) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 57 (High) | 0 (Low) | 35 (Medium) | 0 (Low) | 8 (Low) | 104 (Very high) | 44 (Medium) | 5 (Low) | 6 (Low) | 102 |
| June | 4 (Low) | 0 (Low) | 176 (Very high) | 8 (Low) | 245 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 18 (Medium) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 25 (Medium) | 0 (Low) | 8 (Low) | 35 (Medium) | 12 (Low) | 0 (Low) | 4 (Low) | 44 |
| July | 1 (Low) | 0 (Low) | 31 (Medium) | 4 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 8 (Low) | 5 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 14 |
| August | 1 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 20 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 8 |
| September | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 16 |
| October | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 9 |
| November | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 |
| December | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 |