| 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 | 43 (Medium) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 |
| February | 512 (Very high) | 1 (Low) | 20 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 43 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 174 (Very high) | 0 (Low) | 92 (High) | 1 (Low) | 784 (Very high) | 0 (Low) | 4 (Low) | 2 (Low) | 5 (Low) | 8 (Low) | 5 |
| March | 278 (Very high) | 1,312 (Very high) | 14 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 30 (Medium) | 2 (Low) | 37 (Medium) | 154 (Very high) | 1 (Low) | 86 (High) | 4 (Low) | 24 (Medium) | 20 (Medium) | 31 |
| April | 5 (Low) | 154 (High) | 22 (Low) | 59 (High) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 36 (Medium) | 3 (Low) | 2 (Low) | 130 (Very high) | 10 (Low) | 2 (Low) | 13 (Low) | 66 |
| May | 6 (Low) | 2 (Low) | 266 (Very high) | 108 (Very high) | 71 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 10 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 208 (Very high) | 0 (Low) | 5 (Low) | 402 (Very high) | 89 (High) | 1 (Low) | 16 (Medium) | 88 |
| June | 6 (Low) | 1 (Low) | 298 (Very high) | 43 (Medium) | 456 (Very high) | 2 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 24 (Medium) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 110 (Very high) | 0 (Low) | 9 (Low) | 117 (Very high) | 23 (Medium) | 0 (Low) | 16 (Medium) | 71 |
| July | 6 (Low) | 1 (Low) | 32 (Medium) | 9 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 10 (Low) | 19 (Medium) | 3 (Low) | 1 (Low) | 3 (Low) | 20 |
| August | 2 (Low) | 0 (Low) | 11 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 7 |
| September | 0 (Low) | 1 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 4 |
| October | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 |
| November | 31 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 |
| December | 71 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 |