For finding the maximum rating that a particular account had from 2011 through 2013, the output should look like this:

Account    mYear    MaxRatings
31425       2012        4.77
87625       2013        1.23

For finding the max rating, by account, and from 2011 through 2013, the output should look like this:

Account    mYear    mMonth MaxRatings
31425       2012        6             4.77
87625       2013        9             1.23

Thank you!!