If you want useful numbers about divorce, you have to start with marriage rates. Then it helps if you can determine how many people are repeat-divorcers, so as not to overestimate the number of families affected.
However, I don’t know why anyone but a numbers-wonk would really care. Governments do not consider stable marriage to have any public value, so keeping track of it is just another way to employ a sociology grad who would otherwise be waiting tables.
Well said.