???? ‘2003? ? ? ?? ?? ??? ? ???? ? ?? ?????’?? ???? 77%? ???? ‘? ????’? ??? ‘? ????’? ??? 4%? ????. 19%? ‘????’? ???.

‘2004? ? ?? ?? ??? ? ?? ??? ??? ???’? ??? ???? ‘??? ?’ 43%, ‘? ??? ?’ 29%, ‘? ??? ?’ 22%? ???? ??? ????. ?? ???? ??? ?? ??? ???? ??? ?? ??? ??? ??? ? ? ?? ??? ??? ?? ???? ??? ??? ???? ??? ???? ??.

?????? 40? ???? ‘? ????’(85%), ‘? ??? ???’(33%)? ??? ?? ???. ????? ?? ????(‘? ????’ 85～87%, ‘? ??? ???’ 36～40%)?? ???? ??? ?? ?? ???. ?? ???? ????? 2004?? ?? ????? ? ???? ??(‘? ??? ???’ 22%)? ???.

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