Over the last twenty years, the United States has seen a steady drop in crime rates, including in juvenile crime. From the peak offense era of the 1990s to today, juvenile crime arrests have dropped across the board in leaps and bounds. Robbery and aggravated assault rates have both dropped by 70% since the 1990s, simple assaults are down by 49%, and murder rates have fallen a staggering 82%. The continuously falling crime rates are not necessarily attributable to any one particular action or policy, however, which leads to some debate among activists and lawmakers over which policies are making the biggest differences to help with this issue. There are a few contributing factors, however, that do show significant impact upon juvenile crime rate reduction.