I'm looking for an automatic JIRA solution to produce a Product Backlog burn-down report to see how we are progressing (and forecast) the total backlog. The release burn-down is excellent but it does only allow me to view one single version at a time. I would like to be able to choose all versions and display a complete PBL burn-down to communicate to my customer.
Any suggestions /recommendations how to solve this? 
/Johan