Lifestyle

I had a class, English conversation, first period. We talked about Lifestyle and Personality. I learned the difference of university students' lifestyle in U.S.A and Japan. According to teacher, the ratio of "roommates" in U.S.A is 80%, "live alone" is 10%, and "with family" is 10%.  I think that the ratio of "roommates" in Japan is considerably lower than U.S.A. I live with my family and I think it is common, so I was surprised to know about the difference.