How have the last 6 Presidents disposed mercy petitions?

The last six Indian Presidents have cumulatively disposed 127 mercy petitions, with the most being disposed by current President Pranab Mukherjee, and the least by KR Narayanan. Out of these, R Venkatraman has rejected all 40 mercy petitions that he disposed, while Pranab Mukherjee has rejected 42 out of 49. Dr APJ Abdul Kalam rejected one and commuted the other.