How many times does Rei Ayanami actually say 'Hai' in the series?

[Richard Qunt]

I've watched the whole of Evangelion in the original Japanese and I can't
remember Ayanami saying 'Hai' as often as she is reputed to.

Has anyone actually counted exactly how many times she says it? Off the top
of my head I can only remember about half a dozen. 'Hai' is not the only
thing she says by a long way.