| 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 | 651 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 28 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 2 |
| February | 3,004 (Very high) | 0 (Low) | 10 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 128 (Very high) | 1 (Low) | 540 (Very high) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 5 (Low) | 0 | 0 |
| March | 132 (High) | 768 (Very high) | 10 (Low) | 11 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 18 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 22 (Medium) | 12 (Low) | 14 (Low) | 53 (High) | 1 (Low) | 42 (Medium) | 2 (Low) | 2 (Low) | 16 (Medium) | 6 | 3 |
| April | 23 (Low) | 1,076 (Very high) | 23 (Low) | 12 (Low) | 10 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 57 (High) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 6 (Low) | 841 (Very high) | 0 (Low) | 38 (Medium) | 16 (Medium) | 4 (Low) | 438 (Very high) | 6 (Low) | 10 (Low) | 6 (Low) | 43 | 8 |
| May | 21 (Low) | 2 (Low) | 175 (Very high) | 19 (Low) | 549 (Very high) | 0 (Low) | 0 (Low) | 32 (Medium) | 118 (Very high) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 73 (High) | 0 (Low) | 7 (Low) | 309 (Very high) | 80 (High) | 1 (Low) | 14 (Low) | 57 | 9 |
| June | 7 (Low) | 0 (Low) | 108 (High) | 22 (Medium) | 87 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 1 (Low) | 13 (Low) | 11 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 20 (Medium) | 0 (Low) | 10 (Low) | 20 (Medium) | 14 (Low) | 0 (Low) | 13 (Low) | 43 | 7 |
| July | 2 (Low) | 1 (Low) | 21 (Low) | 3 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 10 (Low) | 8 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 5 | 1 |
| August | 1 (Low) | 2 (Low) | 4 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 31 (Medium) | 5 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 2 | 4 |
| September | 1 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 7 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 27 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 5 (Low) | 2 | 3 |
| October | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 1 | 3 |
| November | 14 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 | 3 |
| December | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 3 |