| 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 | 1,073 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 38 (Medium) | 0 (Low) | 9 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 | 1 |
| February | 525 (Very high) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 18 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 99 (High) | 0 (Low) | 706 (Very high) | 2 (Low) | 11 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 1 | 1 |
| March | 316 (Very high) | 82 (Medium) | 12 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 19 (Medium) | 23 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 13 (Low) | 243 (Very high) | 14 (Low) | 330 (Very high) | 0 (Low) | 105 (Very high) | 2 (Low) | 5 (Low) | 23 (Medium) | 9 | 12 |
| April | 54 (Medium) | 3,088 (Very high) | 43 (Medium) | 24 (Medium) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 221 (Very high) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 0 (Low) | 357 (Very high) | 22 (Medium) | 913 (Very high) | 200 (Very high) | 2 (Low) | 126 (Very high) | 13 (Low) | 8 (Low) | 11 (Low) | 18 | 46 |
| May | 13 (Low) | 144 (High) | 191 (Very high) | 78 (High) | 99 (Medium) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 35 (Medium) | 0 (Low) | 0 (Low) | 47 (Medium) | 2 (Low) | 641 (Very high) | 0 (Low) | 3 (Low) | 307 (Very high) | 35 (Medium) | 13 (Low) | 15 (Medium) | 31 | 14 |
| June | 29 (Low) | 11 (Low) | 292 (Very high) | 31 (Medium) | 806 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 11 (Low) | 0 (Low) | 16 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 214 (Very high) | 0 (Low) | 9 (Low) | 141 (Very high) | 16 (Medium) | 18 (Medium) | 10 (Low) | 29 | 13 |
| July | 4 (Low) | 4 (Low) | 31 (Medium) | 4 (Low) | 71 (Medium) | 0 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 25 (Medium) | 0 (Low) | 12 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 4 | 1 |
| August | 2 (Low) | 3 (Low) | 9 (Low) | 2 (Low) | 7 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 6 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 23 (Medium) | 13 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 15 | 5 |
| September | 3 (Low) | 2 (Low) | 8 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 16 (Medium) | 2 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 26 (Medium) | 15 (Medium) | 0 (Low) | 0 (Low) | 4 (Low) | 4 | 6 |
| October | 25 (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) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 | 5 |
| November | 5 (Low) | 2 (Low) | 4 (Low) | 3 (Low) | 1 (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) | 4 (Low) | 0 (Low) | 3 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 6 |
| December | 22 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 2 | 1 |