Comparing multiple columns in matrix

We're running Monte Carlo repeated measures for several groups.

The goal is to determine the number of time each group has the highest
score.

A toy example:

  [,1] [,2] [,3]
   0.1  0.2  0.3
   0.1  0.2  0.3
   0.1  0.2  0.3
   0.1  0.3  0.2
   0.1  0.3  0.2
   0.2  0.3  0.1

For this example:  group 1 was the top 0 times, group 2 was the top 3
times., group 3 was the top 3 times

I can do this with some messy & statements or loops, but am looking for
an easier way.

Any suggestion?

-N