It demonstrated that many of us have already spent between 95-99% of the time we will see our parents.
Eg:
* presume your parents have you at ~30
* Live at home 18years x 365 days per year = 6570 days
* You see them a week per year for the remainder of their life = 50 years * 7 days per year = 350 days
therefore at 19yrs old you have 350/(6570+350) days remaining ~= 5%