The table illustrates the population, along with the percentage of change of New Zealand between 2011 and 2012 by four different age groups.
Overall, the population for all ages, under 15 and 15-39 year-old age groups showed an upward trend, while the opposite was true for people between 40-64 and 65+ years old. Notably, the number of people aged 65 and above recorded the highest increase.
As for the two downward trend age groups, under 15 years old accounted for 898,160 people in the first year, after which declined slightly to 896,364 in 2012. The number of residents aged 15-39 made up the highest composition throughout the period with 1,577,256 in 2011 and 1,574,102 in a year later. The percentage of change for both of these age groups were -0.2% each.
Concerning the remaining age groups, the 40-64 age group stood at 1,331,907 people in 2011, which then rose considerably to 1,339,898 people in 2012. This rise translated to plus 0.6% in its percentage, which was 3.4% lower than that of people over the age of 65. Similarly, the number of people aged 65 and over went up steeply from 573,946 in 2011 to 596,903 in 2012. Finally, all ages group was 4,381,269 by 2011, before experiencing an increase to 4,410,284 in 2012, leading to the proportion of change added 0.6%.