Response options: Canada, Greenland, Saint Pierre and Miquelon, United States, Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Antigua and Barbuda, Bahamas, Barbados, Bermuda, Virgin Islands (British), Cayman Islands, Cuba, Dominica
Response options: Reference month is January, February or March, Reference month is April, May or June, Reference month is July, August or September, Reference month is October, November or December, Valid skip, Don't know, Refusal, Not stated