An age-standardized mortality rate in Canada in 2011 of 4.9 compared to the age-standardized mortality rate of 10.2 in 2000 means that:

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The age-standardized mortality rate is a measure of the number of deaths per unit of population, adjusted for age distribution. An age-standardized mortality rate of 4.9 in 2011 suggests that, on average, fewer people died in Canada in 2011 than in 2000. Moreover, because this mortality rate is age-standardized, it adjusts for any changes in the age distribution of the population over time. Therefore, the decrease in the age-standardized mortality rate suggests that people are, on average, living longer and dying at later ages. This is likely because the population is becoming healthier, either because of better healthcare, lifestyle changes, or other factors.

An Age-Standardized Mortality Rate in Canada in 2011 of 4