I would like to know wether there is a relationship between how old one is and how long he wants to live!

Is it possible to make such a "relational" poll?

My theory: the older persons choose more natural lifespan, the younger persons choose the eternal life.

Reasons: the elder are more bored about life, they are less afraid of the death, they feel more of the burdon of their responsibilities, they experienced the limits of their perspectives, and they don't expect to experience any essential new thing.