I have a 30% chance of not making it to 80. Boo!
I have a 44% chance of dying in my 80s. Alas.
I have a 24% chance of making it to my 90s. Sweet.
I have a 2% chance of making it to 100. Whoo hoo!
Pure statistical analysis. No consideration of current health, relationships, whether I have a pet, state of mind, genetics, etc.