Lack of CC on On Demand movies

I've been a Comcast ustomer for 22 years now and am hard of hearing. I pretty much need closed captioning. Over this period of time, I've rented dozens of movies On Demand and only once before, maybe 10 years ago, did I rent a movie that had no closed captioning. I've just checked the On Demand films now available by clicking on the movie icons, and notice that the majority of movies offered do not have CC.