Repair Structures with Multiboard

[Mechanic]

I have been thinking. I want to add a new statistic to multiboard called "Structures Repaired." Anybody here have experienced this before? Or anybody know how to make this one? I want structure to be casted by ability called "Repair" after the structure's life reach 100% and counts as 1 to "Structures Repaired" multiboard. I want it to be still counting as 1 for one structure that reached at 100% if it's being repaired by multiple builders, and also prevent it to have count as 1 that being built new structure that went through constructing process. You guys know what I am saying or what I am trying to work on? Thanks for reading and trying to figure out how to make this one. It would be awesome.