The robbery rate in the city has remained consistently at zero from 2010 to 2015. This translates to a robbery rate of 0 per 1,000 people throughout the observed period. The percentage of state robberies attributable to Harrison has also remained at 0% during these years. This absence of robberies, even as the population grew, suggests a very low crime environment and effective local safety measures.

Aggravated assault rates in the city have also remained at zero from 2010 to 2015. This translates to an aggravated assault rate of 0 per 1,000 people throughout the observed period. The percentage of state aggravated assaults attributable to Harrison has consistently been 0% during these years. The absence of aggravated assaults, despite population growth, indicates a peaceful community environment.

When examining correlations between violent crime trends and other factors, we find that the consistently zero violent crime rate doesn't allow for meaningful correlations with population density, median rent, or race distribution. The city's population density increased from 898 people per square mile in 2010 to 930 in 2015, while median rent data is only available from 2013, showing a decrease from $635 to $545 in 2015. The racial composition saw a slight shift, with the white population increasing from 49% in 2013 to 55% in 2015, while the black population decreased from 48% to 42% in the same period. However, these changes did not correlate with any increase in violent crime.

Applying predictive models to forecast violent crime trends for the next five years (up to 2029) is challenging due to the consistent zero rate. Based on the historical data, it's reasonable to predict that Harrison will likely maintain its very low violent crime rate, potentially remaining at or near zero for all categories of violent crime. However, as the population continues to change, there may be slight fluctuations, though they are expected to remain minimal.

In summary, Harrison, Georgia, demonstrates an exceptionally low violent crime rate, maintaining zero incidents across all categories from 2010 to 2015. This trend persisted despite population growth and changes in demographic composition. The city's ability to maintain such a low crime rate in the face of these changes is noteworthy and suggests effective community policing and social cohesion. As we look to the future, the city's challenge will be to maintain this exemplary safety record while managing any potential growth or demographic shifts.