OCHA analysts cited a number of reasons for the decline.
For one, some of the fighting is continuing in the same areas as last year, meaning many have already fled.
Secondly, poverty has increased and some people no longer have the resources to move large families to other places.
Insecurity has also increased in cities previously viewed as safe havens. Kabul, for example, has been regularly attacked by Taliban and Islamic State militants. Hundreds of civilians have been killed or injured since January.
The previously calm north now accounts for 42 per cent of all displacement. The south, which is considered the heartland of the insurgency and saw some of the fiercest fighting in recent months, accounts for 31 per cent.
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