This thing can range so much over a course of a lifetime, depending what one has to adapt to.
I score 3% now and have been below 50% most of my life. Job opportunities weren't great after college, and I ended working at a Military Bowling Center, which required almost 100% social skills.
I was completely out of my element coming out of college, but after about 4 years, if I can put myself back into that place; forced into contact with over one-hundred people a day, I steadily adapted, and got to a point where I looked forward to going to work, for the social interaction over any other aspect of the job.
I try to imagine myself back at that point in time, taking the test, and scoring it with my social skills at that point, I would have scored around 70%, at the peak, but after becoming a supervisor a short time later, I probably dropped below 50%, and eventually below 30% when a computers came along and was eventually stuck behind one everyday.
But, for about 6 years all I did at work was socially interact with people. It was almost like a real life version of the TV show "Cheers".
Most of it did not come naturally for me, I watched other people for what worked best in social interaction, followed those examples, and perfected the equation, to the best of my ability, in hopes of keeping the job. Never got interested in Bowling; people became my special interest.
The three college degrees I earned prepared me for none of it. My emotional/social IQ was probably close to zero, but eventually I was able to learn the rules of a game that don't come with instructions.
I worked at night, and was able to workout vigorously, religiously, everyday before I went to work; that helped calm my nerves tremendously when I started working there. I lived on a natural endorphin high, that me feel somewhat resilient to the stresses of social interaction.
When the new requirments of computers came along in the work environment, it became my excuse to escape people at work; I took advantage of it. It provided a new area of stimulation, that I had never experienced before in my life, that provided an avenue of focus that I never had before.
The brain is an amazing tool, in how it can adapt to different environments, when there is sufficient perceived motivation, for survival, to do so. Modern culture presents many novel types of stimulation that can change a great deal of one's interaction with the world, potentially significantly changing one's worldview.
I would have never walked into a Bowling Alley, had I not gotten that job, and probably never experienced community, through actual social interaction, in an unlimited demographic of different types of people. I can't put into words, and hardly remember how good those social feelings felt. There is no way I could put a price on that.