I'm not sure about the meaning of "are more likely to be heavy drinkers" in the following context:
The flaunting of the current laws is readily seen among university students. Those under the age of 21 are more likely to be heavy -- sometimes called "binge" -- drinkers (consuming over 5 drinks at least once a week). For example, 22% of all students under 21 compared to 18% over 21 years of age are heavy drinkers. Among drinkers only, 32% of under age compared to 24% of legal age are heavy drinkers.
Does the phrase refer to the future (i.e. it's very possible that they will be/become heavy drinkers) or does it refer to the present (it's very possible that they are heavy drinkers now)?
Thank you very much, Petra.