How to find the next average ?

I need to find the next most common number from a list of numbers.

For example:

A

1

1

3

4

5

5

5

5

6

6

7

7

7

8

8

9

The function: =MODE(A1:A16) would give the answer 5. I want to find the next most common number in the list which is 7, How would I implement a function to do this ?

Or am I going about this the wrong way, should I be looking at the Frequency function ?

Thanks Mark.