I am 69 threatening to be the big 70.
So much of longeity depends on a variety of factors like genetics, how well one takes care of themselves and goes for check-ups and or routine maintenance.
One does not have to follow what happened to their parents, but it is prudent to know your families history, so your doctor can watch out for the trends that you might have similiar conditions.
Father passed at 77, ( stopped taking care of himself), mom at 93. I am shooting for the high 80's. As my mom frequently said, "GOD willing".
I had an uncle thru marriage, that lived to 99. brother 99, sisters, 104 and 102 respectively, and still a sister surviving at 104. My blood aunt lived to be 96. Unfortunately, my uncle's blood doesn't run thru me.
As long as I have quality of life, the quantity, will be fine with me.
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"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).