There is no denying that age distribution of population varies

 As is shown in the charts, it is the 0-14-year -old group that took up the biggest part of the population in Yemen in 2000, with over  50%. Contrarily, the majority of people in Italy was between 15 and 59 years old,  with 61.6%,during the same period. Besides, the over-60-year-old group just occupied 3.6% in former country in 2000，whereas this figure in the latter country constituted 24.1%.

 It was estimated that the major population in Yemen will turned into 15-59 years old in 2050. However, it is still the over-60-year-old group that represents the least percentage. On the other hand, although there are some significant differences in the proportion of each component, people between 15 and 59 are the  majority as before. So does 60 years or more.

 To sum up, the predicted trendency of  both two countries in 0-14-year-old group is  similar, as well as the group over 60 years old. It should not be neglected that the 15-59-year-old group occupies the largest proportion in almost all charts except the first one.