From 201308 on, the numbers in download/data.yml are the number of
downloads of the detached OpenPGP signature of the ISO or USB image from
our website.

Adjust month in:

	zgrep '/Aug/.*"GET /torrents/files/tails-[-a-z0-9~.]\+\.iso\.sig .* 200 [0-9]\+' \
	   $(for f in $(seq 90 -1 2); do echo "access.log.$f.gz"; done) access.log.1 access.log | wc -l