The answer is 2-4,000 -
- if you're a man.
If you're a woman the answer is 6-8,000.
Now why do you think there's such a discrepancy?
I have my own theories, but I'd be interested to hear what other people think those extra words are ...
(I don't know how reliable these figures are. My source is a throwaway line on Have I Got News for You.)