Period | 1961-1990 | 1991-2020 | 1961-2020 |
January | 16.41 | 10.44 | 13.06 |
February | 8.56 | 1.39 | 4.28 |
March | 0.00 | 2.06 | 0.00 |
April | 2.70 | 0.00 | 2.70 |
May | 13.44 | 5.49 | 8.10 |
June | 29.83 | 23.15 | 25.85 |
July | 34.54 | 20.68 | 23.29 |
August | 26.02 | 17.52 | 20.14 |
September | 31.38 | 31.59 | 31.38 |
October | 59.65 | 58.21 | 59.65 |
November | 67.10 | 51.76 | 54.46 |
December | 39.31 | 26.26 | 28.87 |