Simple Call Volume per Month line chart

Hi, I'm looking for some tips on creating a simple line chart that shows us how many requests our Service Desk has received per month. So we can get some sort of indication of a request volume trend.
I'd also like to have this as a schedule report to be mailed to me monthly.
I've been having a look at it today, and can almost get what I want by creating a custom Tabular Report. This generates a simple line chart of requests created, per month, but also includes details on all the requests that have been logged, which I don't need. This amounts to a 56 page report.
Is there any way to just create the line chart?

Thanks,

David