The given graph illustrates the proportion of four different age groups in New Zealand between 1950 and 2050.
Overall, there is a prediction of a rise in the proportion of New Zealand residents aged 14 and under and 38 to 45 years old, while a decline is anticipated to be seen in the figures for those who are over 65 and 25 to 37 years old. Despite this, people aged 65 and plus consistently had by far the highest figures throughout the period given.
In 1950, the percentage of people aged 14 and under started at around 5%, after which it maintained this level until 1990 before increasing to 10% in 2000. Similar changes, but to greater extents, were also seen in the figures for those aged 38 to 45 years old and 65 and plus, which grew from 25% to 40%, and from 60% to about 63% in the first 50 years, respectively. Meanwhile, 20% of residents in New Zealand were 25 to 37 years old in 1950, with a subsequent fall to 10% in 1990 and leveling off 10 years later.
By 2050, while the proportion of people aged 38 to 45 years old is expected to witness almost no change, the portion of people aged 14 and below is forecasted to rise to 20%. Conversely, the figures for those who are senior citizens and people aged 25 to 37 years old are predicted to continue to decrease, ending at 55% and around 0%, respectively.