Answer:
The percentage of elderly is growing in Europe due to two main reasons: improved medical care and a better standard of living leading to people living longer, and a decreasing birth rate resulting in fewer young people. As stated in the text, the average life expectancy in Europe has increased from 65 years in 1950 to 75 years today. This improvement in life expectancy can be attributed to advancements in medical care and an overall better standard of living. Additionally, the birth rate in Europe has decreased significantly, with the number of births per 1,000 population being half of what it was in 1950. These factors have contributed to an aging population in Europe, with the world's 15 oldest countries being European. As more people retire and the aging population grows, there is increasing strain on the health care and retirement systems.
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