There will be complaints about the poll. There always are. So before complaining, read this:
Results, as in the poll above, but scaled to account for the different number of years in each range:
Edit 8: Estimates by year, showing preponderance of poll data (340) vs. data from posts (90):
Method for anyone who cares. Questions and suggestions are welcome.
Feel free to discuss age, ageism, legal rights etc. Or criticize the poll. I know you will