This data frame contains information about the counts of dead Japanese by gender and year of birth (cohort), categorized by the whole part of age attained at death.
Format
A data frame with 1038 rows and 4 variables:
- age
integer, age (to the smallest year) at death (in years)
- byear
integer, birth year
- count
integer, number of death for cohort at given age
- gender
factor, the gender of the individuals; either
maleorfemale
Details
These data were obtained from the Annual Vital Statistics Report of Japan, released by the Japanese government every year since 1947. The authors note that "All the members of that cohort have died by the end of the observation period, a procedure referred to as the extinct cohort method". The data were obtained from the Human Mortality Database by the authors. Only positive counts are reported and two records (Misao Okawa and Jiroemon Kimura) are excluded because they do not correspond to the same selection mechanism.
References
Hanayama, N. and M. Sibuya (2016). Estimating the Upper Limit of Lifetime Probability Distribution, Based on Data of Japanese Centenarians, The Journals of Gerontology: Series A, 71(8), 1014–1021. doi:10.1093/gerona/glv113