Many hubbers will not reveal this, because they want to save the subject for themselves, or because they do not want more competition on 'their' subject.
I will tell you this about mine: I have about 115,000 total views on my 112 hubs. One of them accounts for 47,000 of those views, a little over 40% of my total.
It is not my best written hub (in my opinion). It is not my best earning hub (though it has earned some). It is not even my most commented on hub.