As countries develop and their standard of living improves, birth rates fall.

Even in the past 2 years the standard has improved markedly.

The whole premise is that standards of living stay the same, or improve.

A third of directors said standards had not improved at all in the old state schools.

The standard of ethics among good players is generally high, and has improved in the last 30 years.

Living standards at all income levels improved over that period.

The standards should improve as the service becomes more efficient.

It is expected that living standards in the area will improve if the project goes ahead.

The report showed that academic standards were improving at the school.

They believe that such standards would improve the quality of life in less developed nations.