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

来源: pinkdreams 于 2012-01-13 10:33:07 [] [旧帖] [给我悄悄话] 本文已被阅读： 次 (179 bytes)
回答: 我不学经济，不知道其确切定义。 由 老看客 于 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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