Some of these figures and pages may be copyright protected. I take no responsibility for matters related to copyright laws and regulations. Use these at your own discretion.
Augustine DiGiovanna, Ph.D.

Fig. 1.1 Past and projected changes in the population 55 years old and over by age – 1900-2060

The moving graph shows the age distribution of people making up the U.S. Population at different years from 1900 to 2060. There are relatively very few older people at first. Note the “baby boom” bump forming at the left as births increase dramatically at 1945. High birth rate continue until bump is complete by 1965 as birth rates decline. As the people making up the “baby boom” bump age with passing years, the bump moves to the right. Even as the bump fades at 2020, it has produced a dramatic increase in the proportion of elders in the population. That increase remains for years after 2025.
This same moving graph is at the following URLs.
https://www.aei.org/carpe-diem/chart-us-population-distribution-by-age-1900-through-2060/

https://www.pinterest.co.uk/pin/238268636508538633/

Scroll down the page to see the moving graph. It shows the age distribution of people making up the U.S. Population at different years from 1900 to 2060. There are relatively very few older people at first. Note the “baby boom” bump forming at the left as births increase dramatically at 1945. High birth rate continue until bump is complete by 1965 as birth rates decline. As the people making up the “baby boom” bump age with passing years, the bump moves to the right. Even as the bump fades at 2020, it has produced a dramatic increase in the proportion of elders in the population. That increase remains for years after 2025.
https://www.calculatedriskblog.com/2013/08/us-population-distribution-by-age-1900.html

US Census Bureau 2020 census information is at US Census Bureau Reports - 2020 and 2017 .

Fig. 1.2 Elders as percentage of the US population - past and projected

“The U.S. Joins Other Countries With Large Aging Populations”

Watch the video. I video explains and shows the changing age pyramids, including the “baby boomers” bump and the “millennials” bump, which is the next wave of elders. It includes information about changes in the ratios of older women to older men.
It includes information about changes in the ratios of older women to older men.

The graphs in this article show the “baby boomers” and the dramatic increases in elders in numbers rather than percentages of the population.
https://www.census.gov/library/stories/2018/03/graying-america.html

US Census Bureau 2020 census information is at US Census Bureau Reports - 2020 and 2017 .

Fig. 1.3 U.S. birthrates 1900-2020

“The Baby Boom Cohort in the United States: 2012 to 2060”
Issued May 2014, P25-1141, By Sandra L. Colby and Jennifer M. Ortman

This article discusses many aspects of the baby boom phenomenon. Graphs in its Figure 1 show how and why the baby boom bump developed.

https://www.census.gov/content/dam/Census/library/publications/2014/demo/p25-1141.pdf

Fig. 1.4 U.S. births 1900-2020

“The Baby Boom Cohort in the United States: 2012 to 2060”
Issued May 2014, P25-1141, By Sandra L. Colby and Jennifer M. Ortman

This article discusses discusses many aspects of the baby boom phenomenon. See the first part of Figure 1 to see changes in the number if births over time.

https://www.census.gov/content/dam/Census/library/publications/2014/demo/p25-1141.pdf

Fig. 1.5 U.S. death rates for different age groups 1900-2020

Fig. 1.6 Life expectancies - Graphs - 1900-2100

At this site is a simple graph emphasizes the “baby boomer” bump advancing in age 1975-2050
This article discusses and contains graphs and statistics about Demographic Trends. Main topics include the following
A. LIFE EXPECTANCY AND THE INDIVIDUAL LIFE CYCLE
B. POPULATION AGING
     - Population Age Distribution
C. WHY POPULATION AGING MATTERS: AGE PATTERNS OF CONSUMPTION AND LABOR INCOME
D. INDICATORS OF POPULATION AGING AND ITS ECONOMIC IMPACT
     - Age Dependency Ratio
     - Retiree to Worker Ratio
     - Support Ratio
     - Adapting to Population Aging
E. GLOBAL PATTERNS OF AGING
F. UNCERTAINTY IN POPULATION PROJECTIONS
https://www.ncbi.nlm.nih.gov/books/NBK148831/

Data for before 1980
This site has links to detailed population statistics in tables for 1900 through 1979. The tables include the detailed statistics showing the development of the “baby boomers”.
https://www.census.gov/data/tables/time-series/demo/popest/pre-1980-national.html

This article and its graphs present and current and projected high percentages and numbers of elders in the U.S. population. It emphasizes a projected increasing dependency of more elders on fewer younger people.
https://www.census.gov/prod/2014pubs/p25-1140.pdf

These graphs show the present and projected high percentages and numbers of elders in the U.S. population.
https://www.census.gov/library/stories/2018/03/graying-america.html

These graphs show the present and projected high percentages and numbers of elders in the U.S. population.
https://www.nasi.org/sites/default/files/Ortman_2015_NASI.pdf

Life expectancy projections at different ages

For tables, see
https://www.census.gov/content/dam/Census/library/publications/2020/demo/p25-1145-supplemental-tables.pdf

Life expectancies at birth and by age

https://www.researchgate.net/publication/309258497/figure/fig1/AS:614061532258347@1523415086918/Life-expectancy-at-birth-and-remaining-life-expectancies-at-age-65-75-and-85-for.png

Table of life expectancies by age u to 2016
https://www.cdc.gov/nchs/data/hus/2017/015.pdf

Fig. 1.7 U.S. baby boomers at different years - 2000-2060

Use the slider to change the years from 2010 to 2019. Note the “baby boomer” bulge at ages 44-64 in 2010 moves upward as that population cohort ages. Simultaneously, birth rates decline, as shown by narrowing of the base of the pyramid. Thus, the proportion elders in the total population will remain high and then grow.
https://www.census.gov/popclock/?component=pyramid

https://www.census.gov/data/tables/2000/demo/popproj/2000-national-summary-tables.html

Projections – done in 2017 – includes links to other years
https://www.census.gov/programs-surveys/popproj/data/tables.2017.html
https://www.census.gov/data/tables/2017/demo/popproj/2017-summary-tables.html

https://www.census.gov/newsroom/press-releases/2020/population-projections.html

Explains alternate series for immigration – a “new” component of change
https://www.census.gov/data/tables/2012/demo/popproj/2012-summary-tables.html

Life expectancy projections – done in 2000
https://www.census.gov/data/tables/2000/demo/popproj/2000-national-summary-tables.html

Tables of data
https://www2.census.gov/programs-surveys/popproj/tables/2000/2000-national-summary-tables/np-t7-b.pdf

US Census Bureau 2020 census information is at US Census Bureau Reports - 2020 and 2017 .

Fig. 1.8 The structural basis of the body

Fig. 1.9 Homeostasis

Fig. 1.10 Negative feedback diagram

Fig. 1.11 Interactions among types of aging

Fig. 1.12 Reserve capacity

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Previous print editions of the text Human Aging: Biological Perspectives are © Copyright 2000, 1994 by The McGraw-Hill Companies, Inc. and 2020 by Augustine DiGiovanna.

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