Presentation of data that excludes the first 5 to 10 years of experience of those who purchase life insurance. A mortality table shows the number of deaths per 1000 of a group of people. Experience shows that people have a lower mortality rate in the first years after they have purchased insurance, probably because they have recently passed a medical and other tests. A select mortality table includes data only on people who have recently purchased insurance. An aggregate mortality table includes all data.