It is an interesting program I just gave it a try. It, like many other programs, doesn't read my ISO correctly but the focal length data is interesting. Only problem being you can't tell how many times you WOULD have used a different focal length should you have had it.
One thing the exposure plots show is that I use the extremes of my zoom lenses the most, 24 & 105 on the 24-105. Could the lens makers do well by offering us multifocal lenses instead of zooms, say a 24-50-105?
Leica used to have such lenses and they must be easier to make (and deliver better performance) than true zooms.