| 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 | 1,005 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 27 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 8 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |
| February | 747 (Very high) | 0 (Low) | 21 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 128 (Very high) | 0 (Low) | 177 (Very high) | 1 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 2 |
| March | 362 (Very high) | 1,282 (Very high) | 13 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 37 (Medium) | 178 (Very high) | 22 (Medium) | 14 (Low) | 167 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 6 (Low) | 56 |
| April | 12 (Low) | 2,830 (Very high) | 8 (Low) | 48 (Medium) | 32 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 8 (Low) | 0 (Low) | 0 (Low) | 168 (Very high) | 0 (Low) | 50 (High) | 74 (High) | 0 (Low) | 602 (Very high) | 4 (Low) | 18 (Medium) | 17 (Medium) | 6 |
| May | 19 (Low) | 4 (Low) | 271 (Very high) | 77 (High) | 2,085 (Very high) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 19 (Medium) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 63 (High) | 0 (Low) | 6 (Low) | 422 (Very high) | 38 (Medium) | 1 (Low) | 8 (Low) | 10 |
| June | 26 (Low) | 0 (Low) | 152 (Very high) | 26 (Medium) | 530 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 41 (Medium) | 4 (Low) | 0 (Low) | 14 (Low) | 9 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 48 (Medium) | 0 (Low) | 13 (Low) | 105 (Very high) | 27 (Medium) | 0 (Low) | 11 (Low) | 21 |
| July | 1 (Low) | 0 (Low) | 47 (Medium) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 8 (Low) | 0 (Low) | 1 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 17 |
| August | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 23 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 24 |
| September | 1 (Low) | 0 (Low) | 4 (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) | 2 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 |
| October | 19 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 |
| November | 8 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 |
| December | 109 (High) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 |