The least number occurred in North Dakota where there were two bank robberies .

最太平的地方属北达科他，一年只发生了 2 起 劫案。

In contrast allegations are not investigated in just two percent of reported burglaries three percent of drugs complaints five percent of robberies and six percent of non-sexual assaults .

相比之下，只有 2%的报告盗窃案件、3%的毒品案件、5%的 抢劫 案件和6%的非性侵犯案件没有被调查。