It's really a marvelous fact that China is capable of supporting a population four times that of the United States with the arable land half as much as that of the United States.

中国的可耕地仅为美国的一半，却能够负担四倍于美国人口的人民吃饭问题，这的确是一个非常了不起的事实。

youdao

The United Nations estimates that females age ten to twenty-four are one-eighth of the world's population.

VOA: special.2010.06.24

It dropped dramatically in the period from 1954-- this is these filled black bars refer to this axis, polio cases per 100,000 population dropped down to only three or four cases by 1956.

患病率在一九五四年后的,一段时间里急剧下降,该坐标轴上的这些黑色柱形图表明,到一九五六年,小儿麻痹症的发病率,已经降低至每十万人中仅三到四人发病

耶鲁公开课 - 生物医学工程探索课程节选

The American College of Rheumatology says fibromyalgia may affect two to four percent of the population.

VOA: special.2011.07.26

Metropolitan Guadalajara, population four and a half million, sprawls across a sunny, mile-high plateau.

NEWYORKER: The Kingpins

While Hispanics represent at least a quarter of the population in four other districts in the state, their overall population may be spread across the state in ways that do not force an additional majority-Hispanic district.

WSJ: Latino Population Surge Poses Challenge to GOP

She added that research indicated hedgehogs were dying out at a rate of one fifth of the population every four years.

BBC: Anonymous donor gives ?50k for new hedgehog hospital