To understand means to simplify. (RussianПонять - значит упростить) [From Strugatsky's SFnovelВолны гасят ветер (Waves blow out the wind, translated to English as The Time Wanderers)]
... couples living together, 5.6% have a female householder with no husband present, and 37.7% are non-families. 30.9% of all households are made up of individuals and ...