I live in the UK and Before i had the procedure i saw my surgeon once. I went private with Mr.Karidis i would recommend him.You go to one consultation.
This question is difficult to answerl because it is so vague. If you would consider narrowing down your question to a country, state, industry etc., it may be possible to give you a better answer....
I'm not sure if you are trying to say - how many jobs are there IN THE WORLD - but it is hard to tell because there are so many different versions of a job. one job may have many other jobs working...