| 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 | 1,496 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 65 (High) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 3 |
| February | 827 (Very high) | 0 (Low) | 15 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 88 (High) | 0 (Low) | 57 (High) | 1 (Low) | 165 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 0 | 6 |
| March | 959 (Very high) | 798 (Very high) | 9 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 67 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 2 (Low) | 5 (Low) | 8 (Low) | 124 (Very high) | 0 (Low) | 33 (Medium) | 5 (Low) | 12 (Low) | 15 (Medium) | 5 | 10 |
| April | 70 (Medium) | 2,691 (Very high) | 19 (Low) | 22 (Medium) | 5 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 194 (Very high) | 12 (Low) | 69 (High) | 37 (Medium) | 5 (Low) | 1,487 (Very high) | 14 (Low) | 38 (Medium) | 27 (Medium) | 16 | 18 |
| May | 27 (Low) | 22 (Low) | 337 (Very high) | 55 (High) | 359 (High) | 0 (Low) | 14 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 19 (Medium) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 333 (Very high) | 146 (Very high) | 13 (Low) | 977 (Very high) | 76 (High) | 13 (Low) | 19 (Medium) | 32 | 14 |
| June | 13 (Low) | 1 (Low) | 204 (Very high) | 37 (Medium) | 21 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 21 (Medium) | 7 (Low) | 0 (Low) | 16 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 53 (High) | 0 (Low) | 6 (Low) | 32 (Medium) | 24 (Medium) | 0 (Low) | 17 (Medium) | 11 | 7 |
| July | 5 (Low) | 9 (Low) | 79 (Medium) | 7 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 8 (Low) | 7 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 3 (Low) | 7 (Low) | 17 (Medium) | 2 (Low) | 0 (Low) | 3 (Low) | 13 | 6 |
| August | 2 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 13 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 | 4 |
| September | 5 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 43 (Medium) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 2 |
| October | 4 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 | 2 |
| November | 16 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 | 2 |
| December | 9 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |