Robbery rates in the city have remained consistently low. Several years (2012, 2014, 2017, 2018, and 2021) reported zero robberies. The highest number of robberies was 6 in 2015, equating to about 0.25 robberies per 1,000 people. The city's contribution to state robbery figures peaked at 0.09% in 2015 but has generally remained below 0.06%. These low numbers indicate that robbery is not a major issue for the community, with rates well below what might be expected for a city of its size.

Aggravated assault incidents have shown the most significant fluctuations among violent crimes in the city. The number of cases ranged from 8 in 2010 and 2013 to 28 in 2020. This translates to a rate variation of 0.33 to 1.18 per 1,000 people. The city's contribution to state aggravated assault cases has varied between 0.03% and 0.11%, with the highest percentage occurring in 2020. The trend shows an overall increase in aggravated assaults over the period, particularly in recent years.

Examining correlations, there appears to be a moderate positive relationship between population density and violent crime rates. As the population density increased from 2,100 per square mile in 2010 to 2,116 per square mile in 2022, there was a general upward trend in violent crime incidents. However, this correlation is not perfectly linear, as evidenced by year-to-year fluctuations.

Applying predictive models to forecast violent crime trends for the next five years (up to 2029), we can expect a continued gradual increase in overall violent crime incidents if current trends persist. Aggravated assaults are likely to remain the most prevalent form of violent crime, potentially reaching up to 30-35 incidents annually by 2029. Rape incidents may stabilize around 15-20 per year, while robbery and murder rates are expected to remain low, with occasional spikes not exceeding 5 incidents per year for robbery and likely staying at 0-1 for murder.

In summary, Marquette has experienced a notable increase in violent crimes over the past decade, primarily driven by fluctuations in aggravated assaults. Despite this increase, the overall crime rates remain relatively low for a city of its size. The consistent low rates of murder and robbery, coupled with the moderate rates of rape and aggravated assault, suggest that while there are areas for improvement in public safety, the city maintains a relatively stable crime environment. Future crime prevention strategies should focus on addressing the factors contributing to aggravated assaults while maintaining the effective measures that have kept other violent crime rates low.