The table below shows information about the population of New Zealand from 2011 to 2012 by age group

The table gives information about the number population in
New Zealand between 2011 and 2012 followed by age group.
 
Overall, it is clear that the amount of people of all ages was the
most crowded; while the least for the old generation during the
same time.
 
Looking at the chart, starting at more than 4 million people in
2011, the figure continued to increase gradually. It gained nearly
4,500,000 people in 2012 and the percentage of change was
60%. In addition, the proportion of the population under 15 and
13-39 aged was reduced to 0,2% in 2012, about 896,364 people
and 1,574,102 people respectively.
 
Turning to these other factors, the number of 40-64 aged people
was 1,331,907 in 2011, there was a minimal change in 2012, it
raised to 0,6%, at 1,339,898 people. Finally, starting at 573,946
people in 2011,  the number of elderly people was a minimal
change, at 596,903 and it improved to 0,4% in 2012.