Slipping Since the Seventies

"The formula for calculating GPI, for instance, starts with personal consumption expenditures, a major component of GDP, but makes several crucial adjustments. First, it accounts for income distribution. It then adds positive contributions that GDP ignores, such as the value of household and volunteer work. Finally, it subtracts things that are well-being-reducing, such as the loss of leisure time and the costs of crime, commuting and pollution.
"While the U.S. GDP has steadily increased since 1950 (with the occasional recession), GPI peaked about 1975 and has been relatively flat or declining ever since. That's consistent with life-satisfaction surveys, which also show flat or dropping scores over the last several decades."

Robert Costanza argues in the Los Angeles Times that quality of life in the United States has been in decline for over thirty years.