| 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 | 392 (Very high) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 |
| February | 2,654 (Very high) | 0 (Low) | 25 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 100 (Very high) | 0 (Low) | 449 (Very high) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 6 |
| March | 1,140 (Very high) | 271 (High) | 15 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 33 (Medium) | 407 (Very high) | 114 (Very high) | 2 (Low) | 218 (Very high) | 0 (Low) | 25 (Medium) | 3 (Low) | 5 (Low) | 14 (Low) | 37 |
| April | 13 (Low) | 556 (Very high) | 31 (Medium) | 38 (Medium) | 3 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2,043 (Very high) | 8 (Low) | 26 (Medium) | 23 (Medium) | 15 (Medium) | 56 (High) | 17 (Medium) | 3 (Low) | 6 (Low) | 152 |
| May | 5 (Low) | 6 (Low) | 146 (High) | 38 (Medium) | 98 (Medium) | 2 (Low) | 45 (Medium) | 0 (Low) | 0 (Low) | 4 (Low) | 14 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 86 (High) | 0 (Low) | 44 (Medium) | 1 (Low) | 4 (Low) | 165 (Very high) | 13 (Low) | 2 (Low) | 3 (Low) | 239 |
| June | 3 (Low) | 0 (Low) | 29 (Low) | 6 (Low) | 24 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 3 (Low) | 14 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 11 |
| July | 1 (Low) | 0 (Low) | 11 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 11 |
| August | 1 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 11 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 8 |
| September | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 13 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 |
| October | 72 (Medium) | 0 (Low) | 2 (Low) | 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) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 |
| November | 25 (Low) | 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) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 |
| December | 5 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 |