I believe it's the ratio between people in the workforce vs

回答: 我不學經濟,不知道其確切定義。老看客2012-01-13 10:13:35

overall population in their category.  In recent years, the ratio has decreased, -- I suppose that's explained by HBGs growing veggies in their backyard. :))

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我剛剛查了一下, -老看客- 給 老看客 發送悄悄話 老看客 的博客首頁 (178 bytes) () 01/13/2012 postreply 11:09:26

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