Simplify the following text for a Grade 4 native English-speaking person.
Original: In 2000 there were 21,294 households out of which 21.10 % had children under the age of 18 living with them , 62.80 % were married couples living together , 8.10 % had a female householder with no husband present , and 26.40 % were not related .
Simplified: In 2000 there were 21,294 households out of which 21.10 % had children under the age of 18 living with them , 62.80 % were married couples living together , 8.10 % had a female householder with no husband present , and 26.40 % were non-families .