A more difficult task, he said, would be to decrease drug use among those with "serious drug problems."

The use of smoking tobacco, on a daily basis, had in 2011 decreased to only 12.5% and 14.3% among women.

This type of behaviour decreased among older men however, who tended to offer more admiring comments, much like the women.

In addition, the results showed levels of the stress hormone cortisol decreased among people who received bright light therapy.

Its aim is to decrease security vulnerabilities among companies caused by social engineering and human error.

Germany and Austria introduced this model a few years ago to decrease the accident rate among young drivers.

In addition, average waist circumference decreased among obese adult family members.

State officials hope the graduated licensing system will decrease car accidents among teenagers.

This practice dramatically decreased the incidence of seroconversion among health workers when done under certain conditions.