So long as I was at all healthy and able to enjoy life, I can't imagine ever choosing to die.
A follow up question ought to be what you would be willing to give up to live that long.
"Immortality will come to such as are fit for it..." --Ralph Waldo Emerson
I think 100 would have been a more realistic option that more people would take than 120 which is very old. Jeanne Calment the oldest woman in the world only lived to 123. Many people that I have met say they would like to live to 100 to witness one century of change, then they would be happy to drop off the twig. By not having 100 as an option I think your data might be unrepresentatively skewed.
Now how can we turn this poll into political action?
If most of the people want to live longer lives.. what are our respective governments doing to facilitate that?
If not much, then i expect they are remiss in their responsibilities to their citizens