Hi Dave,
I have 2 different theories on this. Theory #1 -You are not a statistic until you are dead and at that time it won't matter (at least not to YOU anyway).

You've got the numbers backwards - there is a 30% chance of dying in the 2nd year and 50% by the 5th year. I'll take the "other" 50% thank you very much.

Theory #2 -All the people out there with bad health habits, who refuse to quit drinking, smoking, chewing or abusing substances, etc. are making y(our) numbers look better (God bless 'em). Of course age and genetics are a factor - 25% of us never drank or smoked.

Remember also that the data is dated and not indicative of current, state of the art treatment(s).

You can improve your odds more by getting treatment at a comprehensive cancer center. They told me 70+% chance of 5 year survival. Some doctors will routinely give you the worst case numbers.