| 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 | 1,232 (Very high) | 0 (Low) | 11 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 58 (High) | 0 (Low) | 1 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 | 1 |
| February | 1,392 (Very high) | 1 (Low) | 16 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 17 (Medium) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 100 (Very high) | 0 (Low) | 197 (Very high) | 3 (Low) | 34 (Medium) | 0 (Low) | 2 (Low) | 1 (Low) | 17 (Medium) | 6 (Low) | 2 | 3 |
| March | 1,280 (Very high) | 6,003 (Very high) | 11 (Low) | 5 (Low) | 0 (Low) | 12 (Low) | 0 (Low) | 2 (Low) | 137 (Very high) | 0 (Low) | 0 (Low) | 3 (Low) | 5 (Low) | 3 (Low) | 1 (Low) | 17 (Medium) | 39 (Medium) | 33 (Medium) | 88 (High) | 717 (Very high) | 0 (Low) | 22 (Medium) | 6 (Low) | 7 (Low) | 21 (Medium) | 14 | 3 |
| April | 43 (Medium) | 5,028 (Very high) | 44 (Medium) | 28 (Medium) | 42 (Low) | 9 (Low) | 0 (Low) | 1 (Low) | 107 (Very high) | 0 (Low) | 0 (Low) | 2 (Low) | 3 (Low) | 15 (Medium) | 0 (Low) | 4 (Low) | 91 (High) | 3 (Low) | 223 (Very high) | 35 (Medium) | 3 (Low) | 1,324 (Very high) | 8 (Low) | 19 (Medium) | 14 (Low) | 18 | 4 |
| May | 22 (Low) | 22 (Low) | 138 (High) | 47 (Medium) | 437 (Very high) | 1 (Low) | 2 (Low) | 0 (Low) | 3 (Low) | 1 (Low) | 7 (Low) | 7 (Low) | 0 (Low) | 12 (Low) | 2 (Low) | 0 (Low) | 4 (Low) | 1 (Low) | 518 (Very high) | 2 (Low) | 11 (Low) | 432 (Very high) | 11 (Low) | 1 (Low) | 8 (Low) | 21 | 3 |
| June | 14 (Low) | 8 (Low) | 50 (Medium) | 12 (Low) | 66 (Medium) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 14 (Low) | 4 (Low) | 0 (Low) | 2 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 33 (Medium) | 1 (Low) | 5 (Low) | 36 (Medium) | 6 (Low) | 1 (Low) | 6 (Low) | 19 | 3 |
| July | 5 (Low) | 2 (Low) | 6 (Low) | 6 (Low) | 3 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 8 (Low) | 4 (Low) | 1 (Low) | 0 (Low) | 3 (Low) | 23 | 1 |
| August | 2 (Low) | 4 (Low) | 5 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 8 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 2 (Low) | 5 | 1 |
| September | 8 (Low) | 2 (Low) | 4 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 5 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 5 (Low) | 0 (Low) | 11 (Low) | 5 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 1 |
| October | 8 (Low) | 2 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 4 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 7 (Low) | 0 (Low) | 3 (Low) | 2 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 2 | 1 |
| November | 8 (Low) | 1 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 3 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 6 (Low) | 0 (Low) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 3 | 1 |
| December | 85 (Medium) | 1 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 0 (Low) | 1 (Low) | 3 (Low) | 1 (Low) | 1 (Low) | 2 (Low) | 0 (Low) | 0 (Low) | 1 (Low) | 1 | 1 |