Researchers using government records have calculated the expected rates of various fatal cancers from such groups.
Few African countries have a cancer registry, so nobody really knows the rates of various cancers.
The teachers, it goes on to say, "may not mention contraception except to point out the failure rates of various methods".
The new study is one of the first to take a detailed look at the unionization rates of various industries in New York City and State.
The first maps came, instead, more than a year later, and they showed rates of various kinds of cancer at a county level -- data the department had already been publishing for several years.
The report, by Exponent Failure Analysis Associates of San Francisco, looked at the collision rates of various cars in the last model year that they were produced without the running lamps, compared with the first year that they had them.
Mr. Delany referred to the late-19th- and early-20th-century work of the sociologist Émile Durkheim, who discovered something previously unknown to social science: the relationships between rates of various sorts of phenomena.
One focus of victimology has centred on identifying and measuring the frequency (both annual incidence and lifetime prevalence rates) of various types of victimizations, such as stalking, date rape, and carjacking.
Respective failure and repair rates of various subsystems.
The evaporation rates of various solvent systems were then determined.
The new product focuses on attribution and conversion rates of various social networks — including Facebook and Twitter.
