??? ９??? ?? ７．６％ ??

?? 1998? 1? 7? 08? 03?

???: ?

???? ?????? ??? ?? 9? 0??? ??? ?? ??? ?????? ?? 7.6% ??? ??? ???. 6? ????? ??? ????? ??? ???? ??? ???? ???? 9??? △???? ?????? ?? 1?83??? 1?1?35??? 4.8% △??? ?? 6?65??? 7.6% △??? ?? 6?63??? 7.1% ?? ????? ?. ??? ???? ???? ??? ?? ??? ???? ?? 15～20%?? 30%? ???. 〈?????〉