If those represent numbers out of 300 people they seem quite high. In March of 2014 the city of Manchester, population 5.4 million, had 2,564 burglaries (statistics here). That translates to a burglary rate of 0.047, or 47/100,000 population. If you had 2 burglaries out of 300 people, that's a burglary rate of 0.667, or 667/100,000 population. That's Third World territory.
People move around since who robs their next door neighbours.... But again if we break it down by postcodes which cover tiny areas (sometimes a street with a handful of 2 bed houses) the numbers based on your method is nonsensical at those levels.
But I feel we are distracting from the point that potential violent crime can happen anywhere and just because you don't hear about it doesn't mean it isn't happening in the neighbourhood whether its poor or a rich one.