| 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 | 1,721 (Very high) | 1 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 16 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 40 (Medium) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 | 3 |
| February | 1,105 (Very high) | 1 (Low) | 22 (Low) | 1 (Low) | 2 (Low) | 5 (Low) | 1 (Low) | 21 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 123 (Very high) | 0 (Low) | 884 (Very high) | 2 (Low) | 12 (Low) | 1 (Low) | 4 (Low) | 6 (Low) | 3 (Low) | 8 (Low) | 2 | 3 |
| March | 2,060 (Very high) | 6,656 (Very high) | 20 (Low) | 11 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 295 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 27 (Medium) | 147 (Very high) | 211 (Very high) | 69 (High) | 378 (Very high) | 1 (Low) | 26 (Medium) | 9 (Low) | 7 (Low) | 24 (Medium) | 14 | 6 |
| April | 36 (Medium) | 1,163 (Very high) | 27 (Low) | 30 (Medium) | 74 (Medium) | 10 (Low) | 0 (Low) | 1 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 21 (Medium) | 1 (Low) | 3 (Low) | 115 (Very high) | 11 (Low) | 115 (Very high) | 23 (Medium) | 4 (Low) | 2,083 (Very high) | 5 (Low) | 7 (Low) | 6 (Low) | 32 | 9 |
| May | 38 (Medium) | 18 (Low) | 135 (High) | 48 (Medium) | 551 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 179 (Very high) | 1 (Low) | 12 (Low) | 376 (Very high) | 12 (Low) | 1 (Low) | 8 (Low) | 23 | 8 |
| June | 13 (Low) | 8 (Low) | 46 (Medium) | 18 (Low) | 73 (Medium) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 24 (Medium) | 7 (Low) | 0 (Low) | 2 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 29 (Medium) | 0 (Low) | 10 (Low) | 41 (Medium) | 3 (Low) | 0 (Low) | 10 (Low) | 40 | 6 |
| July | 2 (Low) | 7 (Low) | 6 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 11 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 254 | 1 |
| August | 2 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (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) | 6 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 16 | 0 |
| September | 3 (Low) | 6 (Low) | 3 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 10 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 | 1 |
| October | 12 (Low) | 3 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| November | 10 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 | 1 |
| December | 44 (Medium) | 2 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |