Excel 2007 : Find the smallest number and total them no more than 1

Does anybody know how to find the smallest number and count the number.

Lets say if you had numbers that are A1 -2, A2 0, A3 -2, and A4 1 how can you find the smallest this being -2 and then count them totaling 1 so in other words the answer for this would be .5.

for smallest =MIN(A:A) for count =COUNT(A:A)