Life Tables for the United States Social Security Area ...
Life Tables
for the United States
Social Security Area
1900-2100
Actuarial Study No. 120
by Felicitie C. Bell
Michael L. Miller
Social Security Administration
Office of the Chief Actuary
August 2005
SSA Pub. No. 11-11536
.
Foreword
Actuarial Study No. 120 displays life tables based on historical and projected mortality in the area
covered by the United States Social Security program. This projected mortality was used in estimating
the future costs for the Old-Age, Survivors, and Disability Insurance (OASDI) program included in the
2005 Report of the OASDI Board of Trustees to Congress. A web address for this and other Actuarial
Studies is OACT/NOTES/actstud.html.
The historical calendar year life tables in this study differ from those published by the National Center for
Health Statistics (NCHS). NCHS prepares U.S. Decennial Life Tables based on the decennial census of
population and deaths for a three year period containing the census year. The series of tables begin with
tables for the period 1900-1902. The most recent set of tables is for the period 1989-1991 and is located at
the following internet site: nchs/products/pubs/pubd/lftbls/lftbls.htm. In addition, NCHS
prepares annual tables that can be found at the following internet site: nchs/fastats/lifeexpc.htm. The tables in this study are better suited to analyze time trends because, unlike the life tables
produced by NCHS, they have all be constructed using the same method.
In addition, the U.S. Census Bureau projects calendar year life tables which differ from those in this
study. A major reason for this difference is due to the different future mortality decline assumptions.
Alice H. Wade
Deputy Chief Actuary
August 1, 2005
.
Table of Contents
I.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
II. Basic Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
III. Construction of Central Death Rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
A. Data Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
B. Adjustments in Population . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
IV. Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A. Definitions of Life Table Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B. Death Rates at Ages 0 ¨C 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C. Death Rates at Ages 5 ¨C 94 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D. Death Rates at Ages 95 and Older. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E. Historical Trends and Projections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
3
4
5
6
6
V. Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
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