Analysts are expecting another year of growth in U.S. sales for the third consecutive year, and in addition, all three U.S. car makers took market share in the States for the first time in 23 years. On the downside, there’s limited room for growth because many younger households are making do without a second car and middle-aged couples are less likely to have a third vehicle now. Put another way, many younger households are broke or in debt or both, and some middle-aged households with a large disposable income have realized that they don’t need an extra car to sit in a driveway collecting leaves.