| 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 | 347 (Very high) | 1 (Low) | 14 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 138 (Very high) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 12 (Low) | 1 | 2 |
| February | 370 (Very high) | 1 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 122 (Very high) | 0 (Low) | 35 (Medium) | 1 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 14 (Low) | 2 | 2 |
| March | 321 (Very high) | 1,486 (Very high) | 9 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 24 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 7 (Low) | 31 (Medium) | 11 (Low) | 23 (Medium) | 96 (High) | 0 (Low) | 22 (Medium) | 5 (Low) | 6 (Low) | 51 (High) | 3 | 4 |
| April | 11 (Low) | 2,412 (Very high) | 12 (Low) | 90 (High) | 3 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 86 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 78 (High) | 1 (Low) | 21 (Medium) | 18 (Medium) | 1 (Low) | 88 (High) | 17 (Medium) | 6 (Low) | 51 (High) | 4 | 10 |
| May | 18 (Low) | 47 (Medium) | 298 (Very high) | 98 (High) | 229 (High) | 23 (Medium) | 0 (Low) | 0 (Low) | 176 (Very high) | 1 (Low) | 1 (Low) | 18 (Medium) | 0 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 103 (Very high) | 1 (Low) | 7 (Low) | 181 (Very high) | 35 (Medium) | 3 (Low) | 37 (Medium) | 53 | 11 |
| June | 13 (Low) | 9 (Low) | 138 (High) | 50 (High) | 404 (Very high) | 1 (Low) | 0 (Low) | 0 (Low) | 54 (High) | 1 (Low) | 21 (Medium) | 8 (Low) | 0 (Low) | 2 (Low) | 22 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 51 (High) | 0 (Low) | 10 (Low) | 107 (Very high) | 24 (Medium) | 1 (Low) | 9 (Low) | 13 | 11 |
| July | 3 (Low) | 4 (Low) | 110 (High) | 15 (Low) | 21 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 17 (Medium) | 10 (Low) | 0 (Low) | 1 (Low) | 67 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 31 (Medium) | 22 (Medium) | 4 (Low) | 0 (Low) | 6 (Low) | 21 | 9 |
| August | 1 (Low) | 2 (Low) | 10 (Low) | 6 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 11 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 17 (Medium) | 6 (Low) | 1 (Low) | 0 (Low) | 10 (Low) | 94 | 3 |
| September | 3 (Low) | 2 (Low) | 5 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 19 (Medium) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 27 (Medium) | 4 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 | 2 |
| October | 29 (Low) | 15 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 14 (Low) | 1 | 2 |
| November | 24 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (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) | 1 (Low) | 2 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 | 1 |
| December | 3 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 | 1 |