When viewing a Contact record, we've added the ability to view login counts by year. Simply click the 'Show History' link next to the 'Login Count:' at the top right side of the Contact screen.
The history shows login counts for each year 2013 and later, beginning with the first year that the Contact logged into the system. If the Contact record was created prior to 2013, it is possible that the total login count shown may exceed the sum of each individual year.