You might want to use SQL for JIRA to transform your JQL for the bugs into a standard SQL query which is a really trivial task.
Then you can use the SQL for JIRA Reports and Charts free extension to create a ROLAP data cube with the status as dimension and then use it as datasource for the chart. It provides an example report that you can use as former for yours.
The vial reports are built with BIRT a easy and very popular free opensource reporting and business intelligence tool.
Anyway if you need some assistance contact to support in order to get help to create your reports.
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