A significant paradigm shift has taken place in the U.S. economy over the last quarter century. During that time, the U.S. economy has been in prosperity 95 percent of the time and in recession only 5 percent. That is, the United States has had a grand total of only five negative GDP quarters in the past 25 years. In the prior two decades, the U.S. economy was mired in recession about a third of the time.Click over for three reasons for the change. You know, since you won't hear about it on the news.