| Month | Cypress/Yew | London Plane | Grasses | Plantain | Olive | Birch | Privet | Alder | Mugwort | Chestnut | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Goosefoot/Amaranth | Oak | Sorrel | Willow | Nettle | Unidentified |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| January | 257 (Very high) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 35 (Medium) | 0 (Low) | 9 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 1 |
| February | 257 (Very high) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 0 (Low) | 40 (Medium) | 1 (Low) | 87 (High) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 12 (Low) | 10 |
| March | 37 (Medium) | 1,048 (Very high) | 11 (Low) | 6 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 83 (High) | 3 (Low) | 70 (High) | 42 (Medium) | 2 (Low) | 156 (Very high) | 6 (Low) | 6 (Low) | 32 (Medium) | 18 |
| April | 2 (Low) | 36 (Medium) | 11 (Low) | 33 (Medium) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 38 (Medium) | 0 (Low) | 15 (Medium) | 1 (Low) | 2 (Low) | 332 (Very high) | 14 (Low) | 2 (Low) | 10 (Low) | 46 |
| May | 5 (Low) | 4 (Low) | 217 (Very high) | 47 (Medium) | 240 (High) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 12 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 65 (High) | 0 (Low) | 10 (Low) | 184 (Very high) | 74 (High) | 6 (Low) | 10 (Low) | 55 |
| June | 6 (Low) | 0 (Low) | 219 (Very high) | 63 (High) | 109 (Medium) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 14 (Low) | 0 (Low) | 6 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 423 (Very high) | 0 (Low) | 8 (Low) | 255 (Very high) | 159 (Very high) | 0 (Low) | 17 (Medium) | 74 |
| July | 2 (Low) | 0 (Low) | 55 (Medium) | 5 (Low) | 6 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 24 (Medium) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 9 (Low) | 7 (Low) | 11 (Low) | 0 (Low) | 4 (Low) | 24 |
| August | 1 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 19 (Medium) | 3 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 9 |
| September | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 4 |
| October | 10 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 |
| November | 232 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 |
| December | 307 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |