That's the industry classification with the largest number of "Software Developers, Applications" occupations from the US Bureau of Labor Statistics[1]. As far as I'm aware, there isn't a comprehensive analysis of occupations by age based on BLS data. I'm guessing your source is a survey that probably has a margin of error larger than the difference between any median ages provided by the BLS for industries that employ the most developers.
Taking the industry as a whole is representative of a typical career path. If your narrow point is that people who have entry level positions are young, well, of course.
If you've got a better dataset than the BLS, I'm sure there are many people who'd be interested, and you should share it.
Taking the industry as a whole is representative of a typical career path. If your narrow point is that people who have entry level positions are young, well, of course.
If you've got a better dataset than the BLS, I'm sure there are many people who'd be interested, and you should share it.
[1] https://www.bls.gov/oes/2018/may/oes151132.htm