These are the most frequently used words in this book.
1900
1910
1940
1950
1990
1991
age
aged
although
among
amount
army
average
benefits
between
bmi
census
century
changes
children
chronic
conditions
coresidence
costs
data
decline
difference
disability
effect
elasticities
elderly
estimated
estimates
even
expenditures
family
farm
farmers
fig
figure
first
force
goods
health
household
income
increase
increased
individuals
insurance
job
labor
less
levels
life
likely
live
living
may
mean
men
note
now
number
occupation
old
older
participation
past
pension
percent
percentage
poor
population
probability
program
rates
recreational
relative
retired
retirement
sample
security
see
social
states
status
survey
table
therefore
time
today
unemployment
union
variable
veterans
whether
work
workers
years