The bars illustrate, in percentage terms, 摆脱用percentage或相关百分比的概念做句子成分。→  the respective populations of Internet users in four places in the years of 1998, 2000, 2002 and 2004.

分组时发现：the four years witnessed highly similar patterns of using the Internet. 于是，这个情况和对应的陈述正好可以作为conclusion的内容。

In the four years, 语法/句型关键得分手段：摆脱用percentage或相关百分比的概念做“主语”。→  homes were where most people use the Internet, 语法/句型关键得分手段：摆脱用percentage或相关百分比的概念做“主语”。→  and those people accounted for roughly a half. The smallest percentage, ranging from 10 to 13 in the four years, was in the category of using the Internet in the library.

语法/句型关键得分手段：摆脱用percentage或相关百分比的概念做主语。→  Workplaces and colleges were not popular places where people use the Internet, and there were 语法/句型关键得分手段：摆脱用percentage或相关百分比的概念做主语。→  barely 20 percent of people use the Internet in either place, except in the years of 1998 and 2000, when barely more than 20 percent of people use the Internet in the workplace. In addition,the year of 2004 is notable, 语法/句型关键得分手段：摆脱用定语从句，而用状语从句描述数据。→ as the Internet users were more in the college than in the workplace.

Overall, 语法/句型关键得分手段：努力摆脱用percentage或相关百分比的概念做主语→  the four years witnessed highly similar patterns of using the Internet.