I need some help to create a formula that will count the number of hits between certain date ranges.

The dates are stored in the format below and are in cells E5:E87

(abstract of data)
01/04/50
12/11/72
22/11/66
15/11/72
02/03/53
01/12/70
30/09/58

What i want to do i i make a graph of with the following rules

People in their...
20 = 1992 - 2002 (return number of hits between the date ranges)
30 = 1982 - 1992
40 = 1972 - 1982
50 = 1962 - 1972
60 = 1952 - 1962
70 = 1942 - 1952
80 = 1932 - 1942
90 = 1922 - 1932

Could some one help me with the formula and i think i have to use wildcards to just take the year and ignore the day and month.

Any help would be much appreciated.

Thanks.