Currently the average life time in the deadabase is 69.4139
But if you could make it to 51, then you are expected to last much longer: 77.9667
But if you could make it to 56, then you are expected to last much longer: 79.3956
And if you could make it to 60, then you are expected to last even much more: 80.5367
Actually, it appears that you spare about one quarter per year lived
This is the super graph of delta days
send an email to garzol@free.fr, and I will see what I can do