"This is the generation of the great LEVIATHAN, or rather, to speak more reverently of that mortal god, to which we own under the immortal God, our peace and defense." -Thomas Hobbes: Leviathan
Number of Non-romans who approve of a speech
Number of Non-romans who subsequently enter the Roman Church.
So mathematically, if all the non-romans who approve of a speech converts, then the inflation index is at a nice low 1. But if very few people convert, then the Inflation Index rises.
The more people there are who approve of a speech and do not convert, the higher the inflation index.