Interesting numbers. Source for not listed, but numbers appear to be believable, by me anyway. FFing participation is definitely on the upswing in the last decade.
Agree with what they see across the country and a nice find @afishinado . I do recall at PFBC study done in the late 1990's that came back with results of about 10% of PA license holders identified as fly fisherman. So that was the height of the license sales in PA and was at about one million. So even with a decrease of anglers (~650,000 now) and increase in fly fishing persons, that still puts the number in PA likely under 100,000. So the number here really hasn't changed or maybe even has gone down. Hard to really know specifically here until a new survey is completed.
A lot of other factors at play too.. Number of days fishing or outings, has that changed in PA? Age of anglers that identify with fly fishing?