Who said Detroit ever had 100 made guys? I doubt it. Unless they were counting the Soldier/Associates who worked under the made guys as being made. In Chicago, the Soldier/Associates who belonged to the crews were not made guys. That's why the number of made guys IN CHICAGO was always smaller. I was always under the impression that Detroit was the same way. A smaller inner core of made guys with Soldier/Associates working full time under them doing specific jobs (like Chicago).
All I know for sure is that if you combined all the men in the crews in Chicago (made or not made) and you combined all the men in the crews in Detroit (made or not made), Detroit was generally 1/3 to 50 % smaller.
Also, The Feds said in 1996 Detroit had 30 made guys. If Detroit's peak was in say 1972, I doubt very seriously they DECREASED from 100 to 30 by 1996. No way.