Has alcoholism increased? Has alcoholism increased since prohibition days? I've seen the sales outlets for alcohol availability rise since the days of the state liquor stores.
I checked the National Institute on Alcohol Abuse and Alcoholism and a news article from NBC without any specific results. Moved to Health SE
According to the OECD (The Organization for Economic Cooperation and Development), alcohol consumption in its member countries (which includes the US) has been decreasing since [at least] 2000. Litres of pure alcohol consumed (a metric for standardizing alcohol consumption across drinks of varying alcohol content) has fallen from 9.5 litres per capita in 2000 to 9 litres in 2015 (roughly 5% decline).

The definition of alcoholism can vary since it typically includes the frequency of consumption within its own definition. The paper I cited includes stats on binge drinking (at least once a month) by gender, but does not compare data to prior years. There's been a ton of research on this topic, so a bit of googling should quickly turn up something useful. CAMH has useful publications and so does the WHO.