| 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 | 1,414 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 28 (Medium) | 0 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 | 1 |
| February | 685 (Very high) | 0 (Low) | 21 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 97 (High) | 0 (Low) | 221 (Very high) | 1 (Low) | 143 (Very high) | 0 (Low) | 2 (Low) | 2 (Low) | 4 (Low) | 12 (Low) | 0 | 0 |
| March | 386 (Very high) | 2,318 (Very high) | 25 (Low) | 6 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 23 (Medium) | 262 (Very high) | 58 (High) | 26 (Medium) | 149 (Very high) | 2 (Low) | 73 (High) | 8 (Low) | 8 (Low) | 15 (Medium) | 3 | 1 |
| April | 20 (Low) | 870 (Very high) | 26 (Low) | 19 (Low) | 327 (High) | 12 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 2 (Low) | 83 (High) | 5 (Low) | 124 (Very high) | 22 (Medium) | 3 (Low) | 1,401 (Very high) | 9 (Low) | 5 (Low) | 88 (High) | 3 | 2 |
| May | 14 (Low) | 5 (Low) | 214 (Very high) | 19 (Low) | 780 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 6 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 39 (Medium) | 0 (Low) | 6 (Low) | 411 (Very high) | 10 (Low) | 1 (Low) | 6 (Low) | 1 | 1 |
| June | 12 (Low) | 4 (Low) | 30 (Medium) | 4 (Low) | 41 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 3 (Low) | 8 (Low) | 45 (Medium) | 4 (Low) | 0 (Low) | 6 (Low) | 2 | 1 |
| July | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (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) | 3 (Low) | 3 (Low) | 10 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |
| August | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| September | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| October | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 0 |
| November | 2 (Low) | 1 (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) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |
| December | 29 (Low) | 0 (Low) | 0 (Low) | 0 (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) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |