The staing numbers in life table is known as

In actuarial science and demography, a life table (also called a moality table or actuarial table) is a table which shows, for each age, what the probability is that a person of that age will die before his or her next bihday ("probability of death") There are two types of life tables used in actuarial science. The period life table represents moality rates during a specific time period of a ceain population. A coho life table, often referred to as a generation life table, is used to represent the overall moality rates of a ceain population's entire lifetime. They must have had to be born during the same specific time interval. A coho life table is more frequently used because it is able to make a prediction of any expected changes in moality rates of a population in the future. This type of table also analyzes patterns in moality rates that can be observed over time Ref : https://en.m.wikipedia.org/wiki/Life_table