First, changes in demographic characteristices, such as the number of people with particlar skills or the growth/decline in particular population segments (marital status, age, gender, ethnicity), affect how companies staff their businesses. For example,married women with children are much more likely to work today than four decades ago. In 1960, only 18.6 percent of women with children under 6 years old and 39 percent of women with children between the ages of 6 and 17 worked. By 2007, those percentages had risen to 61.5 percent and 76.2 percent,respectively.