IELTS writing task 1

The four pie charts depicts the distribution of the population by ages in Yemen and in Italy in 2000 and the relative expectations in predictions for 2050.

It is evident that in Yemen, in 2000, more than one half of the population (50.1%) was very young being between 0 and 14 years old, whilst in Italy this proportion age group accounted only for 14.3%.
People between 15 and 59 years old amounted to 46.3% being the second biggest "piece of pie" in Yemen, while the remaining 3.6% was made up of 60 year old individuals.
In the same year in Italy, people between 15 and 59 years old were the main part of population accounting for 61.6%. However, over 60 year old people over 60 years old made up a noticeably large group being  percentage of 24.1% of the Italian population

In the projections, for 2050, for the Yemen the percentages of population from 15 to 59 years old and over 60 years old are expected to rice rise, reaching 51.3% and 5.7% respectively, whereas people from 0 to 14 years old could see a fall to 37%.
In Italy the predicted situation is different with over 60 year old individuals over 60 years of age expected to increase to 42.3%, whilst the percentages of population from 0 to 14 and from 15 to 59 years old are expected to drop at 11.5% and 46.2% respectively.

If you are talking about people over 60 i would tend to say "people over 60 years of age" rather than "over 60 years old people" as the former sounds more natural . Apart from that this was a good attempt with just a few changes needed. Well done !