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We have to realise how old, how very old, we are. Nations are classified as "aged" when they have 7 ...

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how does a person have to be old    how old does a person have to be    how old a person has to be    how a person has to be  
all developed nations without exception.  every one of Western European countries.  Germany, France, and the United Kingdom.  Sweden, Switzerland, and the United States.  
old people are more dependent than babies.  children are more handicapped than the aged.  the inactive aged are more reliable than children.  infants are more of a handicap than the elderly.  
not so much the decrease in deathrate as the fall in birthrate.  no more the increase in birthrate than that in deathrate.  not the drop in deathrate any more than the rise in birthrate.  as much the growth in birthrate as the decline in deathrate.  
the growth in number of the old is liable for the fall in that of the young.  the unusual statement about the main cause of aged societies is quite valid.  the greater dependency of babies is subject to the change in social structure.  the favorable conditions for continued living are perfect in modern societies.