The odds of getting $9 for a single click is very high, if what you said was true then you are lucky. The highest i got for a single click from my adsense ad is $2.73.
It's usually the big companies that pay that much... What you should be doing is creating 10 websites similar in content but totally original.. Make them around all the same keywords and dominate the first and second page on google... ;0 now that is profit because people can't go anywhere but to you...
$9 is possible....you need to get the highest paying keyword before setting up your blog...there are some keywords that can make you much money... you need to research first...some keyword are very lucrative