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