| 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 | 578 (Very high) | 0 (Low) | 7 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 24 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 62 (High) | 0 (Low) | 2 (Low) | 2 (Low) | 3 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 1 (Low) | 5 (Low) | 0 | 0 |
| February | 1,145 (Very high) | 0 (Low) | 19 (Low) | 6 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 32 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 84 (High) | 0 (Low) | 117 (Very high) | 3 (Low) | 37 (Medium) | 0 (Low) | 6 (Low) | 2 (Low) | 0 (Low) | 14 (Low) | 0 | 1 |
| March | 744 (Very high) | 2,638 (Very high) | 12 (Low) | 4 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 8 (Low) | 1 (Low) | 29 (Medium) | 28 (Medium) | 61 (High) | 36 (Medium) | 91 (High) | 1 (Low) | 37 (Medium) | 8 (Low) | 1 (Low) | 24 (Medium) | 4 | 0 |
| April | 11 (Low) | 557 (Very high) | 12 (Low) | 15 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 7 (Low) | 44 (Medium) | 3 (Low) | 18 (Medium) | 9 (Low) | 0 (Low) | 537 (Very high) | 9 (Low) | 0 (Low) | 52 (High) | 2 | 0 |
| May | 32 (Medium) | 3 (Low) | 120 (High) | 55 (High) | 133 (Medium) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 6 (Low) | 0 (Low) | 13 (Low) | 0 (Low) | 2 (Low) | 10 (Low) | 1 (Low) | 140 (Very high) | 139 (Very high) | 6 (Low) | 987 (Very high) | 809 (Very high) | 35 (Medium) | 14 (Low) | 4 | 0 |
| June | 5 (Low) | 1 (Low) | 70 (Medium) | 12 (Low) | 115 (Medium) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 3 (Low) | 0 (Low) | 16 (Medium) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 260 (Very high) | 10 (Low) | 6 (Low) | 341 (Very high) | 11 (Low) | 0 (Low) | 3 (Low) | 5 | 0 |
| July | 2 (Low) | 1 (Low) | 10 (Low) | 2 (Low) | 6 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 20 (Medium) | 2 (Low) | 1 (Low) | 1 (Low) | 10 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 7 (Low) | 0 (Low) | 5 (Low) | 76 (High) | 2 (Low) | 0 (Low) | 2 (Low) | 2 | 2 |
| August | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| September | 1 (Low) | 2 (Low) | 5 (Low) | 2 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 4 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 0 |
| October | 2 (Low) | 2 (Low) | 2 (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) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 0 |
| November | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (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) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |
| December | 11 (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) | 6 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 | 0 |