The table illustrates the number of people living in New Zealand in 2011 and in 2012 by four age categories (under 15, 15-39, 40-64 and above 65).
Overall, the data indicates that in both the years, the majority of population consisted of individuals aged between 15-39, while senior citizens of age above 65 were in a minority. Additionally, people belonging to age group of 40-64 and 65+ saw a rise in the population in the second year as opposed to the other two groups, who observed a similar decline in their population rate.
In 2011, the total population stood at 4,381,269, which saw a rise of 0.6% and grew to around 4,410,284 in 2012. The major contributors to this average increase in population were the age groups 40-64 and 65+ who saw rise in their number of people, after a period of one year. The 65+ population was just around 573,946 initially, but rose significantly by 4% to a population of 596,903 in 2012. Similarly, 0.6% increase was observed in the age group 40-64, turning a population of 1,331,907 into 1,339,898.
Regarding the youth aged below 15 and adults between 15-39, both saw a decrease by 0.2% in their population. While the under 15 age group declined from 898,160 to 896,364, the 15-39 age category decreased from 1,577,256 to 1,574,102 in the final year.