What does the ageing ratio measure?

The ageing ratio specifically measures the proportion of older individuals, typically defined as those over the age of 65, relative to the working population. This ratio provides insights into the demographic structure of a society, reflecting the balance between the elderly population and those who are part of the labor force.

Understanding the ageing ratio is crucial for policymakers as it can influence economic planning, healthcare, and social services. By analyzing this ratio, one can assess the potential burden that an older population may place on the economy and the workforce.

The other options do not accurately define the ageing ratio. The total number of elderly people in society is a raw count, while the average lifespan of older adults does not address the relationship between age groups. The number of children per elderly person suggests a dependency ratio but does not capture the essence of the ageing ratio's focus on the relationship between older adults and the working population.