Does anyone know of any statistics that show people in the tech industry by age? In other words, I wonder if the sheer number of older people "in tech" is just

Does anyone know of any statistics that show people in the tech industry by age? In other words, I wonder if the sheer number of older people "in tech" is just dwarfed by young people who have been in it all along (As opposed to a career change by a mid-career older person). Also, since the tech industry has grown so exponentially, the number people in the industry in and of itself has expanded to greatly include younger people (versus existing, older people who choose to switch into the field). This is to say that I wonder if people older than 40 or older than 50 are truly underrepresented in tech because of age discrimination or is it because there is, quite literally, not that many of them in tech to begin with?