ȭǰ  ǥ  ұϰ ǥû  Һڵ     ƴ.
ǰǾǰû ҺڽùθӰ  ۳ 10, 10~50  500  'ȭǰ Һ    
ν' ǽ , ǥû Ȯ  ϴ Һڴ 31%  ʴ  Ÿٰ 12 .
Ư 10 76%, 20 78% ǥû Ȯ ʰ ִٰ , 30~50(60~65%)  ȭǰ   
ǥû Ȯϴ    Ÿ.
װ ľû Ϻ ȭǰ   к  ɼ  ǰ ־ 'ȭǰ  ǥ'  Һ ˱Ǹ 
ñ ȭ, Һڵ ǥ  ɰ ν ſ   Ÿ.
' к ְ ǽɵǴ   ȭǰ ϰڳ  ؼ 10~20 33~47%  ʰڴٰ 
, 30 ̻ 63%̻  ʰڴٰ  Ͱ     ν   ƴ.
ľû ڴ "̹   ҺڽùθӰ Ҿ  ȭǰ  ǥ    ν ϰ 
10~20븦 ߽ 'ȭǰ ٷ ˰ ϱ'  ȭǰ  ķ ϰڴ" .
ǰ  ù - ̴ (www.hidoc.co.kr)