Hint for question 9

A hint

A good place to start on such demographic questions is the U.S. Census Bureau. Start with its list of "Subjects A to Z." Dial M for Marriage. Keep drilling down from there.

Remember that it is at http://www.census.gov, not at http://www.census.com.

A finer point: Because of the way the Census Bureau has configured its Web servers, http://census.gov won't work; you need http://www.census.gov This is the kind of problem that is impossible to anticipate; when it doesn't work with a "www," try it without; and vice versa.