| 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 | 335 (Very high) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 29 (Medium) | 0 (Low) | 15 (Medium) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 |
| February | 875 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 44 (Medium) | 2 (Low) | 61 (High) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 2 |
| March | 133 (High) | 360 (Very high) | 28 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 13 (Low) | 1 (Low) | 6 (Low) | 56 (High) | 1 (Low) | 113 (Very high) | 5 (Low) | 7 (Low) | 8 (Low) | 42 |
| April | 44 (Medium) | 475 (Very high) | 26 (Low) | 35 (Medium) | 4 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 22 (Medium) | 1 (Low) | 0 (Low) | 403 (Very high) | 19 (Medium) | 0 (Low) | 15 (Medium) | 246 |
| May | 37 (Medium) | 0 (Low) | 261 (Very high) | 56 (High) | 471 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 33 (Medium) | 0 (Low) | 10 (Low) | 187 (Very high) | 23 (Medium) | 0 (Low) | 23 (Medium) | 29 |
| June | 18 (Low) | 0 (Low) | 160 (Very high) | 28 (Medium) | 136 (Medium) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 26 (Medium) | 26 (Medium) | 0 (Low) | 5 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 40 (Medium) | 0 (Low) | 10 (Low) | 46 (Medium) | 10 (Low) | 0 (Low) | 9 (Low) | 17 |
| July | 2 (Low) | 0 (Low) | 41 (Medium) | 5 (Low) | 6 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 33 (Medium) | 9 (Low) | 0 (Low) | 0 (Low) | 41 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 10 (Low) | 18 (Medium) | 2 (Low) | 0 (Low) | 2 (Low) | 5 |
| August | 1 (Low) | 0 (Low) | 12 (Low) | 6 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 12 (Low) | 12 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 |
| September | 1 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 9 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 |
| October | 15 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 |
| November | 205 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |
| December | 41 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 |