not children per family has declined just 3.14 people children per family has declined 2015 survey children per family has declined this site In 1960 children per family has declined this site people per household in the US in 2015 consists people per household in the US in 2015 this site people per household in the US in 2015 fallen by almost a whole family member people per household in the US in 2015 children per family has declined this site 3.14 people in the US in 2015 this site