And note that this says "online dating" not specifically tinder. Statistics show that 80% of women sleep with 20% of men on Tinder. Tinder is a place women go when they are interested in having sex with men based on nothing other than their looks. That is fine, if you are in the top 20%, if you aren't, it is a real fools errand.
39% in 2017. I'd be very curious to know the numbers over the past two years as in 2017 bars/restaurants were at 27%, school/college at 9%, and work at 11%.