The 2005 business volume is flying over the previous peak.

2005年度营业额正大幅超（飞）越前次高点。 （总不会是飞来飞去吧?）

Market leaders should drop no more than roughly 25% or 30% from their previous peak.

市场龙头调整的幅度不应该大于前期高点的25%-30%。

But output soon recovered and by the end of the year had surpassed its previous peak.

但是输出又很快恢复了，并且在那年底超过了头一个高峰。