| 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 | 4,243 (Very high) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 76 (High) | 0 (Low) | 16 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 3 | 1 |
| February | 706 (Very high) | 1 (Low) | 9 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 65 (High) | 0 (Low) | 81 (High) | 2 (Low) | 14 (Low) | 1 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 5 (Low) | 1 | 1 |
| March | 731 (Very high) | 771 (Very high) | 16 (Low) | 4 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 13 (Low) | 47 (Medium) | 0 (Low) | 0 (Low) | 1 (Low) | 13 (Low) | 2 (Low) | 0 (Low) | 65 (High) | 11 (Low) | 45 (Medium) | 8 (Low) | 1,772 (Very high) | 1 (Low) | 8 (Low) | 2 (Low) | 14 (Low) | 23 (Medium) | 10 | 2 |
| April | 52 (Medium) | 4,261 (Very high) | 18 (Low) | 56 (High) | 1 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 22 (Medium) | 270 (Very high) | 4 (Low) | 117 (Very high) | 68 (High) | 2 (Low) | 1,106 (Very high) | 9 (Low) | 23 (Medium) | 20 (Medium) | 29 | 4 |
| May | 55 (Medium) | 37 (Medium) | 458 (Very high) | 93 (High) | 251 (High) | 2 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 16 (Medium) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 455 (Very high) | 1 (Low) | 4 (Low) | 2,142 (Very high) | 18 (Medium) | 5 (Low) | 7 (Low) | 26 | 3 |
| June | 33 (Medium) | 12 (Low) | 91 (High) | 25 (Medium) | 51 (Medium) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 31 (Medium) | 8 (Low) | 0 (Low) | 6 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 122 (Very high) | 0 (Low) | 7 (Low) | 99 (High) | 11 (Low) | 0 (Low) | 15 (Medium) | 27 | 3 |
| July | 7 (Low) | 8 (Low) | 104 (High) | 11 (Low) | 4 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 18 (Medium) | 7 (Low) | 0 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 11 (Low) | 1 (Low) | 8 (Low) | 17 (Medium) | 4 (Low) | 0 (Low) | 12 (Low) | 31 | 2 |
| August | 2 (Low) | 8 (Low) | 9 (Low) | 8 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 6 (Low) | 10 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 22 (Medium) | 18 (Medium) | 1 (Low) | 0 (Low) | 7 (Low) | 19 | 2 |
| September | 3 (Low) | 5 (Low) | 6 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 18 (Medium) | 9 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 7 | 2 |
| October | 39 (Medium) | 3 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 1 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 4 | 2 |
| November | 229 (Very high) | 1 (Low) | 2 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 1 | 2 |
| December | 689 (Very high) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 2 | 3 |