has changed
in the past ten years在过去的十年里,到目前为止,现在完成时的典型时间状语标志
change在这个句子中是不及物动词,不存在被动语态
像这个句子On second thoughts he changed his mind,这里的change就是及物动词,他就存在被动语态,这个句子就可以写成on the second thoughts his mind was changed (by him)