| 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 | 238 (Very high) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 44 (Medium) | 0 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 3 (Low) | 0 | 3 |
| February | 652 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 169 (Very high) | 0 (Low) | 182 (Very high) | 1 (Low) | 49 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 | 7 |
| March | 505 (Very high) | 1 (Low) | 11 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 8 (Low) | 1 (Low) | 79 (High) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 13 (Low) | 6 | 5 |
| April | 71 (Medium) | 2,577 (Very high) | 12 (Low) | 56 (High) | 5 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 84 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 159 (Very high) | 2 (Low) | 38 (Medium) | 147 (Very high) | 6 (Low) | 834 (Very high) | 15 (Medium) | 12 (Low) | 73 (High) | 28 | 31 |
| May | 20 (Low) | 142 (High) | 92 (High) | 76 (High) | 98 (Medium) | 3 (Low) | 11 (Low) | 0 (Low) | 62 (High) | 0 (Low) | 1 (Low) | 4 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 25 (Medium) | 1 (Low) | 291 (Very high) | 3 (Low) | 4 (Low) | 2,085 (Very high) | 29 (Medium) | 3 (Low) | 16 (Medium) | 23 | 52 |
| June | 66 (Medium) | 7 (Low) | 111 (High) | 91 (High) | 308 (High) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 9 (Low) | 1 (Low) | 6 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 276 (Very high) | 1 (Low) | 10 (Low) | 110 (Very high) | 14 (Low) | 0 (Low) | 16 (Medium) | 20 | 32 |
| July | 16 (Low) | 10 (Low) | 86 (High) | 19 (Low) | 28 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 18 (Medium) | 11 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 31 (Medium) | 0 (Low) | 8 (Low) | 37 (Medium) | 5 (Low) | 0 (Low) | 10 (Low) | 11 | 12 |
| August | 16 (Low) | 6 (Low) | 17 (Low) | 8 (Low) | 9 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 18 (Medium) | 11 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 12 | 19 |
| September | 8 (Low) | 9 (Low) | 10 (Low) | 4 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 19 (Medium) | 15 (Medium) | 1 (Low) | 0 (Low) | 3 (Low) | 3 | 8 |
| October | 92 (High) | 1 (Low) | 8 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 3 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 | 8 |
| November | 44 (Medium) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 | 3 |
| December | 221 (Very high) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 | 2 |