The mortality calculations for domestic animals are based on several scientific papers, listed below.
Any other papers containing life tables (number of survivors for each age) for domestic animals are highly appreciated. Send a message via the contact page if you have any other (more recent) life table data.
The statistical data for dogs and cats is pretty old and with good care dogs and cats are likely to live longer nowadays.
Mortality calculations for dogs: Hideki Hayashidani et al., Epidemiological Studies on the Expectation of Life for Dogs Computed from Animal Cemetry Records, Jpn. J. Vet. Sci. 50(5):1003-1008, 1988.
Mortality calculations for cats: Hideki Hayashidani et al., Epidemiological Studies on the Expectation of Life for Cats Computed from Animal Cemetry Records, Jpn. J. Vet. Sci. 51(5):905-908, 1989.
Mortality of Przewalski’s horse in captivity: Iliana V. Kohler et al., Comparative mortality levels among selected species of captive animals, Demographic Research, 15(14), 413-434, 2006.
Remark: horses of the Przewalski breed live relatively long compared to other horse breeds.