Popularity contest statistics for apt-cacher-ng,apt-cacher,approx,apt-proxy,debmirror,apt-mirror
installed is the sum of the four categories below:
vote is the number of people who use this package regularly
old is the number of people who installed, but don't use this package regularly
recent-ctime is the number of people who upgraded this package recently
no-files is the number of people whose entry didn't contain enough information (atime and ctime were 0).