?? ????? ??? ??? ????? ???? 2007? 54%??? ??? 49%?? ??? ??? ????. ??? ???? ?? ????? ?? ?? ???? ??? 2007? 77.7%?? ??? 34.0%? ????.
?????????? 2007??? ????? ?? ??, ???, 6? ???? ???? ? 25～60? ?? ?? 2530～3500?? ???? ‘????? ??’? ??? ??? ??? 23? ????.
??? ???? ?? ?? ? ??? ???? ??? ???. ??? ????? ??? 2007? 24.4%?? 2009? 40.0%? ??? ?? ???? 85.2%?? 79.4%? ???. ??? ?? ??? ???? 2007? 60? ??? 2008? 23?8000??? ???? ??? 59? ??? ????. ??? ?? ?????? 2007? 56.0%, 2008? 15.1%, 2009? 34.3%? ??? ???? ?? ? ?? ?? ???? ―17.8%, ―35.7%, ―26.0%? ??? ???.