FIGURE 11.6 More Together, Fewer Married As you see, the number of cohabiting male–female households in the United States has increased dramatically over the past decades. These numbers are an underestimate: Couples do not always tell the U.S. Census that they are living together, nor are cohabitants counted when they are within their parents’ households. Same-sex couples (not tallied until 2000) are also not included here.