Final answer:
Countries with Zero Population Growth (ZPG) typically have a conical age structure with a greater percentage of middle-aged and older individuals. This contrasts with rapidly growing populations which have a pyramidal age structure reflecting a large base of younger individuals.
Step-by-step explanation:
Countries that have achieved Zero Population Growth (ZPG), such as Italy, typically exhibit a different age structure compared to their counterparts. In a ZPG country, the age structure of the population tends to be more conical. This results from an equal number of births and deaths thereby maintaining the current population size. This structure indicates a greater percentage of middle-aged and older individuals as opposed to a pyramidal structure exhibited by countries with rapid population growth, where there's a large base of younger individuals.
It's worth noting that other demographic factors, such as industry structure and economic institutions, also play a pivotal role in shaping a country's population dynamics in addition to the age structure.
Learn more about Zero Population Growth (ZPG)