[ppml] real data on PI assignments to end sites?

[Thomas Narten]

Geoff (or anyone else who can help),

In trying to better understand the impacts of various PI-for-end-sites
proposals, it would be helpful to me to understand how many PI
assignments have been made to end sites in IPv4 today. That is, using
IPv4 as a guide, is there data to help us understand the implications
of setting the bar for how "large" an end site should be in order to
be eligible for a PI assignment?  Is it only in the thousands? Tens of
thousands?

Also, are there any trend lines that can help us understand where
things are heading today?

Is such data available, or are there ways to estimate this?

Thomas