exact distribution for Americans about four million Censusscope about 3.5% demographic trends US Census data age pyramid http://www.censusscope org/us/chart_age.html age pyramid 2000 census numbers the age distribution http://censusscope.org/us/chart_age.html age pyramid age pyramid AGE DISTRIBUTION http://www.censusscope.org/us/chart_age.html the age distribution Census Scope Censusscope http://www.censusscope.org/us/chart_age.html aging western populations Having 70% of the population in working age group, Having 70% of the population in working age group, actual population distribution this page on CensusScope.org population distributions from 2000 http://www.censusscope.org/us/chart_age.html over 61,000,000 women in that age range http://www.censusscope.org/us/chart_age.html population pyramid http://www.censusscope.org/us/chart_age.html aging western populations Having 70% of the population in working age group, actual population distribution AGE DISTRIBUTION population pyramid http://censusscope.org/us/chart_age.html http://www.censusscope.org/us/chart_age.html 79.9% of the US population was 15 or older American population pyramid demographic trends Censusscope about 3.5% Census Scope source