A question about bandwidth usage

Hi,

I have installed piwik about 2 weeks ago for my site. We have about 1000 visitors per day and archiving process starts every 1800 seconds.
In this 2 weeks piwik_log_link_visit_action table contains more than 21000 rows and piwik_log_visit table more than 770 rows.
I want to know a bandwidth usage of 1 GB per day is normal for my host?!? :S

that fully depends on the data you deliver. Images, videos or similar stuff will take up much more bandwidth than raw html pages.

Actually I asked to know whether piwik caused this or not?

very unlikely that piwik is the primary source of that bandwidth usage