Between 1970 and 1985, the number of divorces per thousand people doubled in Denmark and Norway and tripled in France, Belgium, and the Netherlands. In England and Wales, while there was only one divorce per fifty-two weddings in 1938, that number became one every 2.2 fifty years later; this trend accelerated in the 1960s. During the 1970s, Californian women visiting their doctors showed a marked decline in the desire for marriage and children. In all Western nations, the number of single-person households steadily rose. In the major metropolitan areas, half the population lived alone. Meanwhile, the traditional nuclear family was in decline. In Canada, the United Kingdom, the Netherlands, and West Germany, only a minority of households comprised of two parents and their children by the 1980s, down from half or more than half in 1960. In Sweden, such a family unit fell from 37% to 25% in the same period; in fact, more than half of all births in Sweden in the mid-1980s were from unmarried women. In the United States, the nuclear family fell from 44% of all households in 1960 to 29% in 1980. But for blacks, the figure was higher. In 1991, single mothers had given birth to the majority of children (70%) and headed a majority of households (58%).