The answer is true.
The explanation for this is very simple. The two reasons for the aging of the Americas are the improvement in the quality of life, it can be emphasized in the part of health, with the cure and treatments of several diseases, that before decimates whole populations. This has dramatically increased life expectancy. Another point to highlight is the low fertility rate, that is, population growth is declining and the number of older people is getting higher than the number of young people.