There are different types of cell death.
There is apoptosis, which is a programmed
cell death. And then there is premature cell
death, which can be cause by numerous factors
including infection, damage, etc.
While I am not certain I can answer your
question definitively, cells in your body are in
constant flux. For example, red blood cells
live around 100 days, skin cells last a
week, some cells are as old as you are such as
your neurons. So you can see the
complication of calculating such a rate. Each cell
type has its own programmed life span and all
cells are not on the same schedule of birth and
death. And this doesn't account for random
death due to outside factors.
Here are a few more turnover times of other
Cells lining your stomach - 5 days
Other gastrointestinal cells - 15 years
Adult liver cells -200-300 days