请教一个句子的意思？

This surge can be expected to continue in the coming years, fueled by recent social changes: personal incomes are rising, more leisure time is available, single-person households are more common, and people have a greater interest in gourmet food, as evidenced by a proliferation of publications on the subject.

Argument 19中的，最后一个分句是什么意思啊？哪位NN给指点一下？

我猜是增刊...

出版物的关于此专题de增刊...

理解成增刊，应该是对的吧。

这句话应该影响到写作文，因为表明它的证据是从一本杂志上来的。很好的攻击点啊。