Average Time Spent on Social Networking Sites Among 18-24 Year Olds

How much time do we spend on social networking? If this study is to be believed, social networking can well be a full time profession for some of us. Here is the average time spent per month on social networks among 18-24 year olds

Less than 10 hours : 18%
10-20 hours : 24%
21-30 hours : 17%
31-40 hours : 16%
41-50 hours : 6%
51-100 hours : 11%
More than 100 hours : 9%
(adds up to 101%!)
Source