1) your argument is right 2) but it hasn't been an average of every 7 years in at least 30 years. It's 13.2 years. And perhaps it shouldn't be. There's lots of

1) your argument is right 2) but it hasn't been an average of every 7 years in at least 30 years. It's 13.2 years. And perhaps it shouldn't be. There's lots of foregone opportunities when you stick in a home and don't move to better employment.