| 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 | 259 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 29 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 47 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| February | 460 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 40 (Medium) | 0 (Low) | 187 (Very high) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 | 0 |
| March | 1,101 (Very high) | 12,595 (Very high) | 13 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 57 (High) | 11 (Low) | 920 (Very high) | 8 (Low) | 697 (Very high) | 0 (Low) | 3 (Low) | 1 (Low) | 4 (Low) | 27 (Medium) | 4 | 4 |
| April | 13 (Low) | 13,230 (Very high) | 39 (Medium) | 112 (Very high) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 4 (Low) | 154 (Very high) | 3 (Low) | 734 (Very high) | 118 (Very high) | 3 (Low) | 1,307 (Very high) | 14 (Low) | 5 (Low) | 30 (Medium) | 15 | 6 |
| May | 11 (Low) | 11 (Low) | 341 (Very high) | 85 (High) | 536 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 0 (Low) | 136 (Very high) | 0 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 598 (Very high) | 0 (Low) | 11 (Low) | 926 (Very high) | 23 (Medium) | 13 (Low) | 15 (Medium) | 25 | 13 |
| June | 5 (Low) | 1 (Low) | 43 (Medium) | 8 (Low) | 273 (High) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 16 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 238 (Very high) | 0 (Low) | 8 (Low) | 148 (Very high) | 6 (Low) | 0 (Low) | 9 (Low) | 5 | 7 |
| July | 2 (Low) | 1 (Low) | 9 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 7 (Low) | 16 (Medium) | 2 (Low) | 0 (Low) | 5 (Low) | 2 | 2 |
| August | 3 (Low) | 1 (Low) | 10 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 22 (Medium) | 20 (Medium) | 1 (Low) | 0 (Low) | 7 (Low) | 2 | 3 |
| September | 5 (Low) | 2 (Low) | 13 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 12 (Low) | 15 (Medium) | 1 (Low) | 0 (Low) | 4 (Low) | 2 | 2 |
| October | 26 (Low) | 0 (Low) | 4 (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) | 4 (Low) | 0 (Low) | 4 (Low) | 12 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 4 | 2 |
| November | 218 (Very high) | 4 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 1 | 2 |
| December | 128 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 | 1 |