| 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 | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 459 (Very high) | 0 (Low) | 16 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | — | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |
| February | 408 (Very high) | 5 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | — | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 42 (Medium) | 0 (Low) | 43 (Medium) | 1 (Low) | 11 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 |
| March | 380 (Very high) | 576 (Very high) | 15 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | — | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 10 (Low) | 41 (Medium) | 3 (Low) | 118 (Very high) | 1 (Low) | 2 (Low) | 2 (Low) | 5 (Low) | 6 (Low) | 5 |
| April | 11 (Low) | 490 (Very high) | 11 (Low) | 17 (Low) | 4 (Low) | 26 (Medium) | 0 (Low) | 0 (Low) | — | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 48 (Medium) | 0 (Low) | 25 (Medium) | 22 (Medium) | 1 (Low) | 100 (Very high) | 8 (Low) | 2 (Low) | 4 (Low) | 50 |
| May | 8 (Low) | 0 (Low) | 338 (Very high) | 138 (Very high) | 279 (High) | 1 (Low) | 0 (Low) | 0 (Low) | — | 0 (Low) | 0 (Low) | 11 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 6 (Low) | 249 (Very high) | 71 (High) | 0 (Low) | 11 (Low) | 83 |
| June | 7 (Low) | 0 (Low) | 55 (Medium) | 26 (Medium) | 202 (High) | 0 (Low) | 10 (Low) | 0 (Low) | — | 0 (Low) | 9 (Low) | 8 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 2 (Low) | 75 (High) | 16 (Medium) | 0 (Low) | 4 (Low) | 24 |
| July | 1 (Low) | 0 (Low) | 75 (Medium) | 22 (Medium) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | — | 2 (Low) | 9 (Low) | 14 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 8 (Low) | 9 (Low) | 14 (Low) | 0 (Low) | 8 (Low) | 9 |
| August | 1 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | — | 7 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 4 |
| September | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | — | 5 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 2 |
| October | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (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) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |
| November | 16 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (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) | 0 (Low) | 1 |
| December | 898 (Very high) | 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) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 |