Comparing Homicide Rates: Why Thunder Bay Has a Problem

From a peak reached in the early 1990s, police reported crimes rates in Canada have been on a downward trend.  This is also the case for homicide rates, which have been on a downward trend nationally since the early 1980s.  There is of course variation from year to year in homicide rates so some type of regression smoothing procedure is helpful in establishing what the longer-term trends over time are.  What quickly emerges from an examination of long-term trends is that Thunder Bay followed national trends in homicide rates until the early 21^st century but that since then there has been a substantial divergence.  It is not a “northern Ontario” thing because the Greater Sudbury CMA tracks provincial and national homicide rates quite closely.

Figure 1 presents LOWESS Smoothed homicide rates for Canada and major regions from 1981 to 2015.  LOWESS is a particularly useful smoothing tool because it helps deal with “outliers” – that is extreme observations that can often distort averages taken over time. The data source is from Statistics Canada (Table 2530004 - Homicide survey, number and rates (per 100,000 population) of homicide victims, by census metropolitan area (CMA), annually).  Canada as a whole has seen a steady decline in homicide rates going from smoothed values of 2.74 per 100,000 in 1981 to 1.51 by 2015 – a drop of 45 percent.  This decline is a feature of the West, Ontario, Quebec and Atlantic Canada though Atlantic Canada sees a sight upturn after 2006.  In terms of regional rankings, homicide rates are now the highest in the West, followed by Atlantic Canada, then Ontario and finally Quebec.