I posted the bookies odds a week or more ago.
I think that there is a feeling that publicly supporting 'remain' is seen as a 'Anti British' and is likely to evoke a negative response in conversation, so those who support 'remain' tend to keep their mouths shut. I have been accused of being a 'millionaire with my nose in the trough' of being 'stupid' and 'shortsighted' on AB for posting in support of 'remain' , similar comments have been aimed at others. It will not change my opinion and I remain confident of a majority 'Remain' vote when the result is announced 3 weeks from today. I was sure a similar situation arose in the Scottish referendum with those who supported staying as part of the UK preferring to keep quite and express their view in the privacy of the polling booth. I am sure the same will apply to this referendum with the quiet majority waiting until 23rd to vote 'remain' in private.
Again as I said before, if you are so sure that 'Leave' will win go down to the bookies and put your money on it , you could get 4/1 last time I looked.(1/4 for 'Remain')