Not formal descriptive statistics. It’s only as I have ‘noticed’. I was in a Buddhist group for a couple years, even lived in with a couple of them in an informal community. They were mostly ex-Catholics and Jews. There is a big half-serious, half-funny word, to me indicating that Buddhism is nearing Kosher status—‘Jubu’.
Yoga and other eastern spirituality has exploded all over the place in these parts. Many yoga studios everywhere. Best place to see for yourself might be a whole foods or new age section of town–the advertisements are all over. This one sect I studied with has more monks, and teachers, than they have places to put them, so it appeared to me. Ayurveda and alternative medicine is big. Probably because there is so much money in these counties (Westchester I believe is the wealthiest one on the USA, though CA might have a competitor).
Hope that answers your question.
Oh yeah, just the other day I heard two elderlyish men outside the church talking about the Heart Sutra–a Buddhist scripture. 'Course they were discrete, but nevertheless, its gaining momentum.