The following anecdote comes from Minnesota, which is said to have a larger proportion of blondes than any other state. Draw your own conclusions.
"My friend Lee overheard this exchange while at the post office last week:I bet her marriage certificate is also in her maiden name.
"Woman Patron: 'I'd like to apply for a passport.'
"Postal clerk: 'Do you have a birth certificate?'
"WP: 'Yes, but it's in my maiden name!'
"The clerk told Lee that this response is not uncommon!" [Link]