| 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 | 304 (Very high) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1,202 (Very high) | 0 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| February | 703 (Very high) | 0 (Low) | 20 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1,057 (Very high) | 0 (Low) | 55 (High) | 6 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 42 (Medium) | 30 (Medium) | 3 | 2 |
| March | 64 (Medium) | 0 (Low) | 25 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 33 (Medium) | 27 (Medium) | 4 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 2 (Low) | 13 (Low) | 1 | 1 |
| April | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| May | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| June | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| July | 2 (Low) | 1 (Low) | 14 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 5 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 5 (Low) | 17 (Medium) | 2 (Low) | 1 (Low) | 2 (Low) | 8 | 0 |
| August | 3 (Low) | 2 (Low) | 11 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 9 (Low) | 11 (Low) | 2 (Low) | 2 (Low) | 3 (Low) | 6 | 3 |
| September | 4 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 1 |
| October | 5 (Low) | 0 (Low) | 30 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 | 1 |
| November | 1,488 (Very high) | 0 (Low) | 80 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 0 |
| December | 326 (Very high) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |