从1980年到2010年，有单身男女组成的“家庭”比例从26%增加到33 % ， 而包括成婚夫妇的家庭比例从60%下降到50 % 。
From 1980 to 2010, the share of “households” that consisted of just a single man or woman rose from 26% to 33%, while the share that contained married couples declined from 60% to 50%.