The United States is scheduled this week to witness its 1,000th execution since the Supreme Court reinstated the death penalty in 1976, but even as it reaches this milestone opponents said capital punishment may be falling out of favor, Reuters reported. Some 997 people have been put to death since the Supreme Court ended a 10-year moratorium on capital punishment that ran from 1967-1977. With five people scheduled for execution in five different states this week, it seems almost certain that the landmark of 1,000 will be passed. "This is a time for somber and sober reflection but the United States is slowly turning away from the death penalty," said David Elliot of the National Coalition to Abolish the Death Penalty. "Death sentences are down 50 percent since the late 1990s to around 150 a year. Executions are down 40 percent from the high of 98 in 1999," he said. The Supreme Court ruled earlier this year that crimes committed by juveniles could not be punished by death. That resulted in 71 people being taken off death row and followed another Supreme Court decision in 2002 declaring that it was unconstitutional to execute criminals who are mentally retarded. A Gallup poll last month showed 64 percent of Americans favored the death penalty -- the lowest level in 27 years, down from a high of 80 percent in 1994. "There's now considerable public skepticism about whether all those being executed are really guilty and that has cast doubt on the whole system," said Richard Dieter of the Death Penalty Information Center. Texas, Virginia and Oklahoma account for more than half of the 997 executions performed since 1977. Texas alone has carried out 355. --more 0002 Local Time 2102 GMT