1950s: An annual middle-class income ranges between $3,000 and $10,000 annually. More than 60 percent of Americans fall into the middle class.

1990s: The annual median income of all U.S. households is $35,492. Americans aged 65 and older have a lower median income: $28,983.

1950s: Utah experiences a population gain of between 20 and 30 percent. By 1955, Utah's population is 781,000.

1990s: The population of Utah is 2,059,000, with 8.7 percent more than 65 years of age. Utah is one of the ten fastest-growing states in the country. The population rises by 19.5 percent from 1990 to 1997.

1950s: In 1955, 71 percent of American households own an automobile and 76 percent own a television set.

1990s: In 1996, more than 129 million automobiles are registered in the United States. In 1997, 98.7 percent of all American households own at least one color television.

1950s: An average of 21.3 per 100,000 deaths are caused by car accidents annually.

1990s: In 1995, 56,155 fatal car crashes, out of around 6.8 million...