| 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 | 801 (Very high) | 0 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 42 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 192 (Very high) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 0 |
| February | 1,014 (Very high) | 0 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 22 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 673 (Very high) | 0 (Low) | 110 (Very high) | 1 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 3 (Low) | 0 | 1 |
| March | 1,006 (Very high) | 13 (Low) | 5 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 6 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 10 (Low) | 0 (Low) | 135 (Very high) | 4 (Low) | 166 (Very high) | 0 (Low) | 2 (Low) | 0 (Low) | 17 (Medium) | 4 (Low) | 6 | 1 |
| April | 210 (Very high) | 228 (High) | 13 (Low) | 10 (Low) | 0 (Low) | 87 (High) | 0 (Low) | 0 (Low) | 65 (High) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 1 (Low) | 7 (Low) | 38 (Medium) | 60 (High) | 20 (Medium) | 4 (Low) | 42 (Medium) | 3 (Low) | 7 (Low) | 11 (Low) | 19 | 3 |
| May | 12 (Low) | 23 (Low) | 70 (Medium) | 29 (Medium) | 16 (Low) | 10 (Low) | 1 (Low) | 0 (Low) | 318 (Very high) | 0 (Low) | 3 (Low) | 5 (Low) | 0 (Low) | 12 (Low) | 3 (Low) | 0 (Low) | 243 (Very high) | 2 (Low) | 65 (High) | 0 (Low) | 1 (Low) | 299 (Very high) | 17 (Medium) | 6 (Low) | 33 (Medium) | 20 | 3 |
| June | 62 (Medium) | 8 (Low) | 183 (Very high) | 73 (High) | 204 (High) | 1 (Low) | 77 (High) | 0 (Low) | 73 (High) | 2 (Low) | 2 (Low) | 9 (Low) | 0 (Low) | 7 (Low) | 2 (Low) | 0 (Low) | 9 (Low) | 0 (Low) | 612 (Very high) | 0 (Low) | 3 (Low) | 143 (Very high) | 43 (Medium) | 0 (Low) | 12 (Low) | 35 | 2 |
| July | 50 (Medium) | 1 (Low) | 154 (Very high) | 8 (Low) | 30 (Low) | 2 (Low) | 25 (Medium) | 0 (Low) | 0 (Low) | 2 (Low) | 8 (Low) | 5 (Low) | 0 (Low) | 6 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 160 (Very high) | 0 (Low) | 4 (Low) | 23 (Medium) | 2 (Low) | 0 (Low) | 8 (Low) | 8 | 1 |
| August | 4 (Low) | 1 (Low) | 7 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 5 (Low) | 6 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 3 | 1 |
| September | 2 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 5 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 | 1 |
| October | 8 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (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) | 7 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 | 0 |
| November | 4 (Low) | 0 (Low) | 1 (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) | 0 (Low) | 21 (Medium) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |
| December | 20 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 | 1 |