In each of 15 recent and consecutive years, 1,000,000 people in the United States were randomly selected and the number who were homicide victims was determined, with the results listed below. Are the proportions of homicides within statistical control? What does the control chart suggest about the trend? (The values are based on data from the U.S. Department of Justice, and they are the most recent values available at the time of this writing.)

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85 87 94 98 93 95 90 82 74 68 63 57 55 56 56