The percentage is probably higher than 7%, as many people with SA go untreated. It's actually surprising how many people have (or had) it. I used to be open about my SA when I had it bad, and no one around me seemed to understand. Now that I keep it to myself, I seem to come across more people who either have it or had it in the past.
Complaining about your situation will get you nowhere, though. That's all I did for a while. If anything, I was using my SA as an excuse. I was also just way too worried about what people would think of me if I became more outgoing, so I felt miserable for a long time.
Eventually, though, I got to the point where I just didn't give a sh*t anymore. I got fed up. I didn't want to conform to societal norms, but unfortunately if I didn't, I'd get nowhere. Now I hardly ever experience SA, and I feel a lot happier.