| 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 | 330 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 73 (High) | 0 (Low) | 7 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 9 (Low) | 1 | 4 |
| February | 513 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 90 (High) | 0 (Low) | 90 (High) | 1 (Low) | 64 (High) | 1 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 17 (Medium) | 5 | 7 |
| March | 41 (Medium) | 1,017 (Very high) | 3 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 363 (Very high) | 2 (Low) | 32 (Medium) | 69 (High) | 0 (Low) | 45 (Medium) | 1 (Low) | 8 (Low) | 63 (High) | 15 | 22 |
| April | 14 (Low) | 399 (Very high) | 36 (Medium) | 139 (Very high) | 13 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 274 (Very high) | 1 (Low) | 35 (Medium) | 3 (Low) | 2 (Low) | 189 (Very high) | 7 (Low) | 3 (Low) | 14 (Low) | 22 | 35 |
| May | 9 (Low) | 11 (Low) | 238 (Very high) | 184 (Very high) | 278 (High) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 20 (Medium) | 0 (Low) | 19 (Medium) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 243 (Very high) | 0 (Low) | 8 (Low) | 582 (Very high) | 26 (Medium) | 1 (Low) | 13 (Low) | 68 | 50 |
| June | 5 (Low) | 7 (Low) | 96 (High) | 33 (Medium) | 200 (High) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 17 (Medium) | 14 (Low) | 0 (Low) | 13 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 133 (Very high) | 0 (Low) | 5 (Low) | 280 (Very high) | 8 (Low) | 1 (Low) | 10 (Low) | 37 | 42 |
| July | 2 (Low) | 1 (Low) | 46 (Medium) | 14 (Low) | 5 (Low) | 0 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 20 (Medium) | 12 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 69 | 17 |
| August | 8 (Low) | 0 (Low) | 6 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 24 (Medium) | 8 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 19 | 18 |
| September | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 12 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 | 7 |
| October | 43 (Medium) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 | 6 |
| November | 332 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 19 (Medium) | 1 | 6 |
| December | 1,003 (Very high) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 43 (Medium) | 0 | 4 |