Thank you for downloading the More or Less podcast from the BBC.

You can find out more about our programme on our website,

bbc.co.uk slash radio4.

But before you do that, here's Tim Halford.

Hello and welcome to More or Less, a happy marriage of numbers and news.

We may be fans of cold logic and hard data on this programme,

but let's wing in our hearts for romance.

So we're devoting much of this edition of More or Less

to wedding-related statistics.

Think of it as our way of throwing a street party.

And although we can't offer bunting or cake,

we can offer startling insights like this.

The 750 million audience that has been quoted widely

for the Charles and Diana wedding,

intriguingly actually has no known source.

But let's start with the fact that despite Friday's great event,

the number suggests marriage just isn't all that popular anymore.

Wesley Stephenson's here.

Where's it? Can't be true, can it?

Well, I'm afraid it is. It is true.

Marriage has been on the slide, in fact, since the 1970s.

And that's not just in terms of absolute numbers,

...