(CNN) — Americans are drinking more. A lot more. According to a new study published in JAMA Psychiatry, an estimated one out of every eight Americans struggles with an alcohol disorder.

The study tracked drinking patterns among 40,000 people between the years of 2002 and 2003, and then again from 2012 to 2013 to create a long-term picture of their habits. The results are chilling, especially in light of other substance abuse crises plaguing the country.Overall, alcohol use disorders rose by almost 50%, affecting a projected 8.5% of the population during the first research period, and 12.7% during the second. That’s almost 30 million Americans actively struggling with alcohol abuse.

Overall, alcohol use disorders rose by almost 50%, affecting a projected 8.5% of the population during the first research period, and 12.7% during the second. That’s almost 30 million Americans actively struggling with alcohol abuse.

The numbers are even more grim for certain groups. According to the research, alcohol use disorders have almost doubled (92.8%) among the African American population, and increased nearly 84% among women.

However, the group that saw the highest increase in alcohol abuse disorders actually wasn’t women or minorities. It was senior citizens. Individuals 65 and older saw a staggering 106.7% increase in alcohol use disorders from 2002/2003 to 2012/2013. For 45- to 65-year-olds, that increase was also high at 81.5%.