The death rate data of everyone who purchased life insurance, without categorization it will be based on the time or age of purchase. The combined statistics of mortality tables are included in the calculation.

For the purpose of pricing insurance and ensuring the solvency of the insurance companies by means of adequate reserves, actuaries are required to develop projections on future insured events ( such as sickness, disability, death, etc.) In order to do such, actuaries create mathematical models of the timing of the event and the amount.