This might be irrelevant but it may help. If your suffering for bandwidth cost there is a free service called Cloudflare, https://www.cloudflare.com/. I use it for my site and it saves lots of bandwidth and protects you from spammers. But it is a reverse proxy so your logs may look different usless you install themod_cloudflare. I use Cloudflare and find it excellent the load times droped significantly.
If you want to see your site viewers there is Google Anylitics which uses javascipt, there are also montly reports and other stuff.
Here are other anylitics that I recommend
Smarter Stats-log based anylitics that runs on the server