Count of sums

[mattis]

When I run this script, I get a result that looks like this:

(0, 0, 0, 1, 1) => 2
(0, 0, 0, 1, 2) => 3
(0, 0, 0, 1, 2) => 3
(0, 0, 0, 1, 1) => 2
(0, 0, 0, 1, 2) => 3
(0, 0, 0, 1, 2) => 3
(0, 0, 0, 1, 1) => 2
(0, 0, 0, 2, 2) => 4
(0, 0, 0, 2, 1) => 3
(0, 0, 0, 2, 1) => 3
(0, 0, 1, 1, 2) => 4
(0, 0, 1, 1, 2) => 4
(0, 0, 1, 1, 1) => 3
(0, 0, 1, 2, 2) => 5
(0, 0, 1, 2, 1) => 4
(0, 0, 1, 2, 1) => 4
(0, 0, 1, 2, 2) => 5
(0, 0, 1, 2, 1) => 4
(0, 0, 1, 2, 1) => 4
(0, 0, 2, 2, 1) => 5
(0, 0, 1, 1, 2) => 4

On the right is the sums of subsets which are in parenthesis. I'd like to count numbers of say 4s, 5s, 6s etc and printed at the bottom. How can I achieve this?