Some scholars have found an increase in arrests for youth and have concluded that this may reflect more aggressive criminal justice and zero-tolerance policies rather than changes in youth behavior. Youth violence rates in the United States have dropped to approximately 12% of peak rates in 1993 according to official US government statistics, suggesting that most juvenile offending is non-violent. Many delinquent acts can be attributed to the environmental factors such as family behavior or peer influence. One contributing factor that has gained attention in recent years is the school to prison pipeline. The focus on punitive punishment has been seen to correlate with juvenile delinquency rates. Some have suggested shifting from zero tolerance policies to restorative justice approaches.