Between 1990 and 2009, the national violent-crime rate was halved, while property crime dropped to 60 percent of its previous rate, according to the National Archive of Criminal Justice Data. But almost every year since 1989, most Americans have told pollsters they believe crime is getting worse. The disparity has been especially clear in New York City. That city saw the most dramatic crime decline of all: Since 1990, the homicide rate has dropped 82 percent, robbery by 84 percent, rape by 77 percent, and auto theft a stunning 94 percent, according to the New York Police Department.