| 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 | 261 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 47 (Medium) | 0 (Low) | 13 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 5 |
| February | 840 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 62 (High) | 0 (Low) | 130 (Very high) | 1 (Low) | 7 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 7 (Low) | 1 | 11 |
| March | 401 (Very high) | 4,367 (Very high) | 8 (Low) | 2 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 1 (Low) | 19 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 4 (Low) | 1 (Low) | 7 (Low) | 35 (Medium) | 79 (High) | 68 (High) | 566 (Very high) | 1 (Low) | 26 (Medium) | 13 (Low) | 13 (Low) | 37 (Medium) | 12 | 10 |
| April | 29 (Low) | 1,046 (Very high) | 22 (Low) | 23 (Medium) | 94 (Medium) | 9 (Low) | 0 (Low) | 0 (Low) | 28 (Medium) | 22 (Medium) | 0 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 10 (Low) | 93 (High) | 2 (Low) | 238 (Very high) | 27 (Medium) | 2 (Low) | 482 (Very high) | 6 (Low) | 41 (Medium) | 39 (Medium) | 46 | 21 |
| May | 13 (Low) | 8 (Low) | 16 (Low) | 19 (Low) | 249 (High) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 109 (Very high) | 0 (Low) | 2 (Low) | 147 (Very high) | 4 (Low) | 8 (Low) | 10 (Low) | 29 | 13 |
| June | 5 (Low) | 2 (Low) | 32 (Medium) | 78 (High) | 4 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 3 (Low) | 38 (Medium) | 8 (Low) | 0 (Low) | 18 (Medium) | 7 | 2 |
| July | 4 (Low) | 1 (Low) | 39 (Medium) | 46 (Medium) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 12 (Low) | 19 (Medium) | 5 (Low) | 0 (Low) | 9 (Low) | 13 | 4 |
| August | 2 (Low) | 0 (Low) | 6 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 13 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 15 (Medium) | 13 | 2 |
| September | 7 (Low) | 3 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 9 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 2 | 2 |
| October | 34 (Medium) | 4 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 7 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 1 | 2 |
| November | 1,228 (Very high) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 19 (Medium) | 2 | 2 |
| December | 474 (Very high) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 | 1 |