Give statistics since the beginning

Or specify a custom date range e.g. last 6months, last 4 weeks.

Maybe have a preset breakdown along with a custom date range:

3 months
6 months
9 months
12 months
15 months... etc

Maybe even listed the highest rated month ( by specifics like page views, hits, etc... )
Just a thought.

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Best Regards,
Mark J
http://www.raremedicaldiseases.com