Data scientist Henrik Lindberg has a series of fascinating charts based on data from the US Bureau of Labor Statistics that show who people in the United States spend their time with over the course of their lifetime. Check out the charts here. From a report on Quartz: Some of the relationships Lindberg found are intuitive. Time with friends drops off abruptly in the mid-30s, just as time spent with children peaks. Around the age of 60 -- nearing and then entering retirement, for many -- people stop hanging out with co-workers as much, and start spending more time with partners. Others are more surprising. Hours spent in the company of children, friends, and extended family members all plateau by our mid-50s. And from the age of 40 until death, we spend an ever-increasing amount of time alone. Those findings are consistent with research showing that the number of friends we have peaks around age 25, and plateaus between the ages of 45 and 55. Simply having fewer social connections doesn't necessarily equal loneliness. The Stanford University psychologist Linda Carstensen has found that emotional regulation improves with age, so that people derive more satisfaction from the relationships they have, whatever the number. Older people also report less stress and more happiness than younger people.