People arriving as permanent and long-term migrants outnumbered those departing.
Canterbury climbed to 64 kg/N/ha/year from a 50 kg N/ha/year rolling average for 2013/14 and 2014/15.
The data show guest nights in the North Island fell 1.3%, while South Island guest nights declined 5.4%.
A Market Economics report estimates the quake will hit gross domestic product by $465 million over two years
New Zealand's central bank has long signalled that an overheated housing market is a key risk to financial stability.
This year is looming as the one when Canterbury can finally break free of its image as an earthquake recovery city.
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