i'm not sure of the range. check out salary.com for some stats on this. it takes into account which part of the country you are from.
i make $11.00/hr as a part-time certified tech, after 2 years, in Iowa. I started at only $7.25! My rate has not been performance based, just the going rate for being certified. Here, this rate of pay (my current rate) is decent...if you lived in say California, I'd say you were underpaid.
"Maybe in order to understand mankind, we have to look at the word itself: "Mankind". Basically, it's made up of two separate words - "mank" and "ind". What do these words mean ? It's a mystery, and that's why so is mankind."