| 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 | 1,002 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 282 (Very high) | 0 (Low) | 15 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 | 0 |
| February | 1,128 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 151 (Very high) | 0 (Low) | 292 (Very high) | 4 (Low) | 27 (Medium) | 0 (Low) | 2 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 | 1 |
| March | 963 (Very high) | 88 (Medium) | 10 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 8 (Low) | 67 (High) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 108 (Very high) | 1 (Low) | 95 (High) | 31 (Medium) | 132 (Very high) | 1 (Low) | 5 (Low) | 9 (Low) | 7 (Low) | 2 (Low) | 1 | 2 |
| April | 84 (Medium) | 272 (High) | 5 (Low) | 5 (Low) | 1 (Low) | 41 (Medium) | 0 (Low) | 1 (Low) | 68 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 7 (Low) | 6 (Low) | 51 (High) | 28 (Medium) | 2 (Low) | 14 (Low) | 2 (Low) | 2 (Low) | 2 (Low) | 6 | 2 |
| May | 7 (Low) | 33 (Medium) | 125 (High) | 41 (Medium) | 40 (Low) | 11 (Low) | 24 (Medium) | 0 (Low) | 151 (Very high) | 0 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 14 (Low) | 1 (Low) | 0 (Low) | 89 (High) | 1 (Low) | 416 (Very high) | 1 (Low) | 7 (Low) | 1,603 (Very high) | 40 (Medium) | 3 (Low) | 168 (Very high) | 36 | 3 |
| June | 9 (Low) | 2 (Low) | 74 (Medium) | 7 (Low) | 22 (Low) | 1 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 546 (Very high) | 0 (Low) | 3 (Low) | 326 (Very high) | 22 (Medium) | 0 (Low) | 6 (Low) | 23 | 2 |
| July | 4 (Low) | 2 (Low) | 33 (Medium) | 3 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 11 (Low) | 6 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 13 (Low) | 0 (Low) | 7 (Low) | 38 (Medium) | 10 (Low) | 3 (Low) | 4 (Low) | 6 | 2 |
| August | 2 (Low) | 1 (Low) | 9 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 4 (Low) | 15 (Medium) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 1 |
| September | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 7 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 2 | 0 |
| October | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 2 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 | 1 |
| November | 9 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 41 (Medium) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| December | 37 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 | 1 |