| 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 | 309 (Very high) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 |
| February | 246 (Very high) | 0 (Low) | 22 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 14 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 81 (High) | 0 (Low) | 42 (Medium) | 1 (Low) | 274 (Very high) | 1 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 8 (Low) | 4 |
| March | 60 (Medium) | 1,185 (Very high) | 6 (Low) | 3 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 4 (Low) | 113 (Very high) | 4 (Low) | 23 (Medium) | 105 (Very high) | 1 (Low) | 45 (Medium) | 2 (Low) | 11 (Low) | 29 (Medium) | 81 |
| April | 60 (Medium) | 71 (Medium) | 15 (Low) | 26 (Medium) | 212 (High) | 6 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 20 (Medium) | 1 (Low) | 31 (Medium) | 3 (Low) | 9 (Low) | 258 (Very high) | 5 (Low) | 10 (Low) | 13 (Low) | 65 |
| May | 10 (Low) | 2 (Low) | 89 (High) | 58 (High) | 311 (High) | 0 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 7 (Low) | 0 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 15 (Medium) | 0 (Low) | 8 (Low) | 127 (Very high) | 19 (Medium) | 3 (Low) | 9 (Low) | 43 |
| June | 7 (Low) | 0 (Low) | 93 (High) | 57 (High) | 18 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 21 (Medium) | 8 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 11 (Low) | 5 (Low) | 36 (Medium) | 0 (Low) | 10 (Low) | 27 |
| July | 1 (Low) | 0 (Low) | 19 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 12 (Low) | 1 (Low) | 6 (Low) | 0 (Low) | 12 (Low) | 26 |
| August | 0 (Low) | 0 (Low) | 4 (Low) | 4 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 39 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 6 |
| September | 2 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 26 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 |
| October | 8 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 |
| November | 11 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 |
| December | 11 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 |