Working visa appliement statistics?


I wonder if anybody knows a link about HK working visa statistics.
I am especially interested in figures about the average time requiered to get the visa and the succes or failure rates.

I have read many pessimistic links about getting a working visa in HK and I would like to know how many chances I have to get one... :?

I am aware that it depends on many factors such as skills, kind of job, etc. but it always interesting to see that the average time is 2, 4, 6 monts.... :o