?? ??? 20?? ?? ??, 10? 中 1??? ??…??? ????
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18? ?????????? ???? ‘??????’ 9??? ?? ‘?? ??? ??? ????’? ??? ?? ?? ???? 2008? 7.4%, 2009? 7.1%, 2010? 6.3%? ????? 2011? 6.8%, 2012? 7.9%? ??, ?? 2013? 6.2%? ?? ????.
???? ???? 20? ???? ?? ?? ????. 20? ???? 2008? 12.7%, 2009? 11.1%, 2010? 7.4%, 2011? 10.4%, 2012? 13.6%, 2013? 9.1%? ?? ????. 2014??? 8.9%? ????.
?? ??? ?? ???? 30~40??? ?? ?? ???. ?? ?? ?? ???? 43.1%. ???? ???? 40?(54.4%), 30?(53.2%), 50?(39.4%), 60?(35.8%), 20(34.8%) ???.
?? ?? ???? ????????(OECD) ??? 4?? 1 ???? ?? ???. ??? 20? ??? ???? ?? ?? ?? ???? ??? ???? ??? ??? ???.
?? ??? 20?? ?? ??. ??=?? ??? 20?? ?? ??
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