Dashboard component that shows the number of tickets open more than 7 days

Dashboard component that shows the number of tickets open more than 7 days

I'm trying to create a dashboard that contains all of my metrics that I need to report to my boss. One of those metrics is the number of open tickets more than 7 days old. I can get a component that lists all the tickets but I haven't been able to find one that just shows me the number. I've created a custom report but I have to run it 4 times to cover the 4 years of Desk tickets we have (users often reopen old tickets instead of creating new ones). Is there a component that will do this?