Shows the further decline of social ties in local communities. A trend that is over two generations old. If one looks back at the same group in the 1970s their social contacts will seem huge .

Addition thoughts: this trend is also what has caused the collapse of local politics in the USA, and broke grassroots. It was a necessary precursor to the rise of the oligarchs.

And one can also see this reflected in fewer churches, bars, places of prostitution, pool halls, social clubs etc etc