| 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 | 339 (Very high) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 6 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 2 |
| February | 493 (Very high) | 1 (Low) | 56 (Medium) | 10 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 91 (High) | 0 (Low) | 60 (High) | 3 (Low) | 146 (Very high) | 0 (Low) | 0 (Low) | 2 (Low) | 5 (Low) | 14 (Low) | 31 |
| March | 79 (Medium) | 1,363 (Very high) | 63 (Medium) | 7 (Low) | 5 (Low) | 7 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 29 (Medium) | 11 (Low) | 16 (Medium) | 123 (Very high) | 3 (Low) | 45 (Medium) | 3 (Low) | 141 (Very high) | 33 (Medium) | 58 |
| April | 68 (Medium) | 58 (Medium) | 63 (Medium) | 26 (Medium) | 243 (High) | 7 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 16 (Medium) | 1 (Low) | 0 (Low) | 9 (Low) | 3 (Low) | 93 (High) | 1 (Low) | 4 (Low) | 595 (Very high) | 7 (Low) | 4 (Low) | 22 (Medium) | 467 |
| May | 18 (Low) | 2 (Low) | 98 (High) | 73 (High) | 441 (Very high) | 1 (Low) | 31 (Medium) | 1 (Low) | 1 (Low) | 1 (Low) | 7 (Low) | 1 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 82 (High) | 0 (Low) | 9 (Low) | 234 (Very high) | 17 (Medium) | 0 (Low) | 14 (Low) | 97 |
| June | 3 (Low) | 1 (Low) | 88 (High) | 53 (High) | 7 (Low) | 2 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 21 (Medium) | 11 (Low) | 0 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 7 (Low) | 7 (Low) | 21 (Medium) | 0 (Low) | 40 (Medium) | 73 |
| July | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| August | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| September | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| October | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| November | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| December | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |