93% probably is the Total Decisions / Total Application in the 12 month period based on monthly application and release of visa data released by IRCC on its website.
But what we have understand here is that it a rolling calculation i.e. whether 80% cases applied in Apr 2017 got decisioned by Sep 2017 and so forth. For example; out of 100 cases filed in Apr 17, 10 may have been approved in May 17, 15 in Jun 17, 17 in July 17, 18 in Aug 17, 20 in Sep 17. In this example 80% cases are decisioned in 6 months and 20% beyond 6 months period for the month of April 17. At the same some portion of the May 17 applications would also be there in the subsequent months of Jun 17 till Sep 17.
Actually we need trail data of each case's progression to ascertain this which is unfortunately only with IRCC. Hope I haven't made it very complicated than it already is.
Right now the only close to precise data available in this context is on immitracker which we should consider as a fair sample for interpretation purpose. And I think
@cansha is doing a great job in sharing these data insights.