| Month | Plantain | Olive | Birch | Privet | Alder | Maple | Mugwort | Composites | Hazel | Heather | Eucalyptus | Ash | Mulberry | Elm | Pine | Poplar | Oak | Sorrel | Willow | Nettle | Other | Unidentified |
| January | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| February | 0 | 0 | 6 | 0 | 8 | 1 | 0 | 1 | 1 | 0 | 0 | 54 | 0 | 169 | 3 | 44 | 2 | 0 | 2 | 23 | 2 | 4 |
| March | 1 | 0 | 5 | 0 | 2 | 24 | 1 | 2 | 3 | 0 | 1 | 9 | 10 | 35 | 50 | 117 | 38 | 1 | 2 | 14 | 9 | 6 |
| April | 36 | 2 | 8 | 0 | 1 | 13 | 0 | 2 | 0 | 2 | 0 | 1 | 133 | 4 | 51 | 30 | 284 | 6 | 7 | 43 | 14 | 3 |
| May | 147 | 361 | 28 | 1 | 0 | 5 | 1 | 21 | 0 | 13 | 0 | 0 | 97 | 1 | 342 | 1 | 1.687 | 38 | 5 | 35 | 77 | 7 |
| June | 27 | 102 | 0 | 4 | 0 | 0 | 0 | 13 | 0 | 10 | 4 | 0 | 0 | 1 | 102 | 0 | 213 | 6 | 0 | 10 | 32 | 6 |
| July | 9 | 7 | 1 | 5 | 0 | 0 | 2 | 5 | 0 | 1 | 14 | 0 | 0 | 0 | 14 | 0 | 71 | 2 | 0 | 15 | 345 | 2 |
| August | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 10 | 0 | 0 | 1 | 73 | 1 |
| September | 3 | 2 | 0 | 1 | 0 | 0 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 8 | 1 | 0 | 1 | 5 | 2 |
| October | 1 | 1 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 0 | 1 | 0 | 0 | 1 | 3 | 0 | 3 | 0 | 0 | 1 | 3 | 1 |
| November | 1 | 1 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 1 | 0 | 0 | 3 | 1 | 1 |
| December | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 6 | 0 | 1 | 2 | 0 | 2 | 0 | 0 | 10 | 1 | 5 |