Earlier quoted context omitted.
They also weirdly assume you have a 2BR on a single income, which is not the norm.
What is the norm? Fewer, or more bedrooms than two?
If you are a single person with a single income, you are not renting a 2BR. You might have a roommate, but in that case you are a two income household splitting the rent on a 2BR.
Single income for 2BR is such an odd case to base an entire statistic around.