It generally depends on her country of birth. The wait is much longer for Filipinos than for Canadians, for example. Google "Visa bulletin March 2012". Chose the link from the Department of state, something with .GOV at the end. You will see a chart with about 25 squares, five vertically and five horizontally. The category is Family based 4, so look for the category F4. It will be bottom horizontal row. Then select her country of birth and should see a date. For example, below Mexico, 4F you will see May 22, 1996. This means that people who are beneficiary of a petition I-130 filed BEFORE 5-22-1996 are now ready for consular processing or adjusting status. Whatever your sister's country of birth, she still has to wait because the earliest possible date for 4F is October 8, 2000. The longest wait is for Filipinos (Dec 22, 1988). I hope this answer your question.
Answered on Mar 05th, 2012 at 3:11 PM