http://reason.com/archives/2013/02/04/pro-immigration-conservatives-shouldnt-p
"A 2011 study by the pro-immigration National Foundation for American Policy found that the wait time for a U.S. citizen to bring a brother or sister from the Philippines exceeded 20 years, and from Mexico 15 years, because these countries get the same annual quota as every other nation yet the demand for them is much greater, creating backlogs. For siblings from other countries, the wait time is about a decade—a little less for adult unmarried children, and a little more for married ones."
"A 2011 study by the pro-immigration National Foundation for American Policy found that the wait time for a U.S. citizen to bring a brother or sister from the Philippines exceeded 20 years, and from Mexico 15 years, because these countries get the same annual quota as every other nation yet the demand for them is much greater, creating backlogs. For siblings from other countries, the wait time is about a decade—a little less for adult unmarried children, and a little more for married ones."