2010? ?? ?·?? ?? ??? 19.2%? ???? ?????? 2011? 21.3%? ????. ?? ???? 7??? 3?2285?? ??? ?? ???? 22.1%? ????. ?? ??? ?? ??? 2010? 44.5%?? ?? ??? 42.7%? ????.
????? ‘?? 4?’(??·??·??·???)?? ???? ??? ???? ???? ??? ??? ???. ?? 4? ???? ?·?? ????? 2010? 59.1%?? ? ??? 52.8%? ???? ?? ???? 18.3%?? 23.7%? ???. ??? ???? ???? ?????? ???? ??? ?? ???.