min Jan

max Jan

min Feb

max Feb

min Mar

max Mar

1948-58

20

25

20

27

17

25

1958-68

17

25

15

25

8

25

1968-78

17

22

18

25

15

25

1978-88

19

23

18

24

15

25

1988-98

18

23

17

24

15

23

1998-2008

19

22

17

23

18

23

2008-2014

20

23

17

23

20

25