Review my ielts writing task 1. Can I get 6.5

The given line graph demonstrates the proportion of New Zealand population over the course of 100 years, starting from 1950. Overall, it is apparent that the percentage of people over 65 and between 25 to 37 is predicted to decrease while the opposite is true for people under 14 and aged between 38 and 45. Additionally, the major population in New Zealand is the elderly over 65.

The proportion of people over 65 stood at 60 % in 1950 before increasing steadily to reach a peak of 70% in 1990. Then this figure witnessed a slight decrease in the following 10 years and is predicted to continue to decline in 2050. Compared with the percentage of people aged between 38 and 45, its value saw a gradual growth of 5%, from 25% to 30% in the first 10 years. Then this figure surged remarkably to get a high record at 50 % in 1990. In the 50-year period, starting from 2000, this value is predicted to undergo a stable period.

People aged between 25 to 37 made úp for one fifth of New Zealand's population in total in 1950. Its value rose gradually in 1960 before plunging sharply between 1960 and 2050. Besides, the proportion of people under 14 represented at approximately 5 % in the starting years and remained constant through the next 40 years. In 2000, the percentage of teenagers had the same value as that of people aged 25 and 37, precisely 10%.