It would be very interesting to cross correlate with age. Some programmers were exposed to code at a very young age. IMO, programming for 10+ yrs by age 20 is far more fascinating of a statistic than say programming for 15+ yrs by age 50.

I ticked 10+, and I am 26. I was designing 'web pages' when I was in middle school, albeit geocities html, but then had my first programming class (C++) when I was 15. Curly braces do not phase me.