| 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 | 1,004 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 31 (Medium) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 1 | 1 |
| February | 746 (Very high) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 73 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 62 (High) | 0 (Low) | 277 (Very high) | 1 (Low) | 21 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 60 (High) | 2 | 4 |
| March | 356 (Very high) | 522 (Very high) | 5 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 7 (Low) | 12 (Low) | 24 (Medium) | 806 (Very high) | 0 (Low) | 3 (Low) | 2 (Low) | 10 (Low) | 76 (High) | 8 | 2 |
| April | 36 (Medium) | 5,506 (Very high) | 28 (Low) | 33 (Medium) | 17 (Low) | 26 (Medium) | 0 (Low) | 1 (Low) | 28 (Medium) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 11 (Low) | 220 (Very high) | 2 (Low) | 121 (Very high) | 184 (Very high) | 5 (Low) | 598 (Very high) | 13 (Low) | 12 (Low) | 108 (Very high) | 24 | 4 |
| May | 147 (High) | 30 (Medium) | 458 (Very high) | 87 (High) | 326 (High) | 4 (Low) | 2 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 1 (Low) | 20 (Medium) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 2 (Low) | 555 (Very high) | 0 (Low) | 6 (Low) | 1,093 (Very high) | 74 (High) | 1 (Low) | 32 (Medium) | 39 | 4 |
| June | 31 (Medium) | 3 (Low) | 341 (Very high) | 38 (Medium) | 781 (Very high) | 1 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 15 (Medium) | 24 (Medium) | 0 (Low) | 3 (Low) | 24 (Medium) | 0 (Low) | 0 (Low) | 6 (Low) | 291 (Very high) | 22 (Medium) | 8 (Low) | 278 (Very high) | 20 (Medium) | 0 (Low) | 11 (Low) | 12 | 2 |
| July | 4 (Low) | 0 (Low) | 10 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 11 (Low) | 6 (Low) | 5 (Low) | 12 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 4 | 1 |
| August | 1 (Low) | 1 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 7 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 | 1 |
| September | 2 (Low) | 3 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| October | 6 (Low) | 6 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 2 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 | 1 |
| November | 9 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 89 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |
| December | 22 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |