Cobol is used in pretty much all enterprise legacy systems.
But "used in" doesn't mean that it's actively being developed by more then a tiny team for maintaining it.
As this graph we're commenting on is mostly talking about popularity/most used it's never going to rate higher, because for every one Cobol dev there are more then 100 Java devs employed by the same company
That's a pretty wild claim. What's legacy for you? I'd consider legacy e.g J2EE crap running on web[sphere|logic] as holding most of the points in that league table vs COBOL.
A legacy software to me is whatever the company that employs me says is said legacy software.
Pretty much every business I've worked at to date has had such legacy software, which was inevitably still used in some contexts.
It's not always obvious, because - following with the previous example numbers - only 1-2 Java devs will have to interact with the legacy software again, hence from the perspective of the remaining 98, Cobol doesn't exist anymore.
But "used in" doesn't mean that it's actively being developed by more then a tiny team for maintaining it.
As this graph we're commenting on is mostly talking about popularity/most used it's never going to rate higher, because for every one Cobol dev there are more then 100 Java devs employed by the same company