These statistics are currently broken due to hardware failure.
Sorry.
FreeBSD Update usage statistics
The following graphs show the total number of machines successfully running
FreeBSD Update each day for each version of FreeBSD for which updates are
provided, the number of machines running FreeBSD Update from a crontab
each day for each version of FreeBSD for which updates are provided
(measured as "IP addresses which run FreeBSD Update at the same time (to
within an hour) on two consecutive days"), and the number of machines which
download patches (ie, were out of date prior to running FreeBSD Update).
Dynamic IP addresses and proxies make these values somewhat inaccurate, but
the net result is probably that the actual numbers are slighly above what is
shown.
These graphs are generated by running the raw access log for
update.daemonology.net through a perl script to extract the daily values,
using MetaPost to draw the graphs, and converting them to png format with
peps.