I wish I knew about what the average human beings score should be. I believe you're not looking for Alzheimers treatment in the near future. Don't sweat it. I work around some real patients but, that's not where this came from. You are still young, whereas,, I remember numbers more than names and, I'm rotten at skilled math. Just believe you are as average as the rest of us. I am sure someone scored a 5%. They may not want to reveal themself.