The table presents demographic information regarding the population of New Zealand segmented by age group for the years 2011 and 2012.
Overall, it is evident that the total population of New Zealand experienced a modest increase, with the most significant growth observed in the older age demographic.
In terms of age-specific populations, the younger cohort, particularly those under 15, saw a slight decline from 898,160 in 2011 to 896,364 in 2012, marking a decrease of 0.2%. Similarly, the population within the 15-39 age group also decreased slightly, falling from 1,577,256 in 2011 to 1,574,102 in 2012, which again corresponds to a 0.2% reduction.
Conversely, the middle-aged demographic (40-64 years) experienced notable growth, increasing from 1,331,907 in 2011 to 1,339,898 in 2012, representing an increase of 0.6%. The most pronounced expansion, however, occurred within the senior population (65+ years), which grew significantly by 4.0%, from 573,946 to 596,903 individuals over the same period. Ultimately, the overall population of New Zealand rose from 4,381,269 to 4,410,284, equivalent to a 0.6% increase.