How much do you earn?

Okay. I need to rant about this issue. Almost EVERYBODY has been asking me about my salary and as you all should know, the amount of an individual's salary is actually supposed to be private and confidential. I used to ask my friends casually how much is the pay being offered for their jobs just to know the market rate. The reason why i said that I used to ask is because I know almost everybody's salary. LOL. I don't mind disclosing my pay to other fresh grads whom are my friends but I don't