Andy and Craig have already pointed to this:TPCI - TIOBE Programming Community Index. What I like is this statement:
"The index can be used to check whether your programming skills are still up to date or to make a strategic decision about what programming language should be adopted when starting to build a new software system."
In other words, don't come to me with ignorant statements like "no one works in Visual FoxPro anymore" or "it's a dead language" - seems I heard that mentioned ten years ago when PowerBuilder was the tool of choice. Where is that now? Oh yeah, I think it's number 90 on the list. Even last year, Visual FoxPro was higher than that.
Sure the list is based on Google, MSN and Yahoo searches but hey - it's ALL about mindshare and the VFP community has plenty of it.