| 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 | 307 (Very high) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 | 2 |
| February | 404 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 34 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 173 (Very high) | 0 (Low) | 125 (Very high) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 | 15 |
| March | 331 (Very high) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 13 (Low) | 2 (Low) | 282 (Very high) | 0 (Low) | 10 (Low) | 1 (Low) | 5 (Low) | 21 (Medium) | 2 | 14 |
| April | 49 (Medium) | 1,007 (Very high) | 22 (Low) | 62 (High) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 8 (Low) | 430 (Very high) | 1 (Low) | 448 (Very high) | 46 (Medium) | 3 (Low) | 536 (Very high) | 14 (Low) | 11 (Low) | 65 (High) | 15 | 132 |
| May | 9 (Low) | 19 (Low) | 67 (Medium) | 90 (High) | 110 (Medium) | 7 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 31 (Medium) | 1 (Low) | 64 (High) | 2 (Low) | 4 (Low) | 1,119 (Very high) | 19 (Medium) | 6 (Low) | 16 (Medium) | 57 | 117 |
| June | 23 (Low) | 0 (Low) | 113 (High) | 52 (High) | 637 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 10 (Low) | 0 (Low) | 7 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 205 (Very high) | 0 (Low) | 14 (Low) | 83 (High) | 10 (Low) | 0 (Low) | 15 (Medium) | 33 | 64 |
| July | 5 (Low) | 1 (Low) | 41 (Medium) | 5 (Low) | 21 (Low) | 0 (Low) | 49 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 7 (Low) | 20 (Medium) | 4 (Low) | 0 (Low) | 6 (Low) | 37 | 36 |
| August | 1 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 14 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 14 | 18 |
| September | 12 (Low) | 5 (Low) | 8 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 10 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 | 9 |
| October | 132 (High) | 1 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 50 (High) | 0 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 | 9 |
| November | 77 (Medium) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 | 8 |
| December | 78 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (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) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 | 5 |