You can:
This view should let you figure out if there is a correlation between severity and priority, as well as the modules that seem to have stability issues.
You can:
You may want to focus on the old bugs (previous years and months) that show high priorities: this is not normal.
In this view, you can also observe the months during which bugs have been created: larger areas shows months for which lots of bugs have been created, most likely testing phases.