Web Page Activity - Daily Report is missing data

Hello,

I have a daily web page activity report set up that I recieve in my inbox each morning.  Everything was working as expected until about 3 days ago - now my report is showing only 3-4 lines of data each morning.  For some reason it is not pulling web traffic like it used to (unless we are only getting 3 people visiting our site daily all of a sudden which I would find very hard to believe).  We have made no changes to the website, but my only thought is that something happened to the munchkin code on our site.  Before I contact my web admin vendor (who charges by the hour), I wanted to see if there is anything else that could be causing this issue?

Thanks!