The study,published,compared serveys between the early 1990s and the mid-2000s.

应该是：The study,（which is )published,compared surveys between the early 1990s and the mid-2000s..已发表（出版）的研究报告比较了90年代早期和2005年或者2006年前后的调查结果.the mid-2000s在汉语中没有类...