The Department of State Visa Bulletin provides a summary of immigrant visa numbers for both family and employment based permanent residence applications. Because there are a limited number of immigrant visas available each year, there is a "waiting list" for some categories of eligibility. This waiting list is determined by the "priority date" of each immigrant visa application, which is the date the application was filed. For employment based applications, most categories are current which means there is no waiting period before an approved applicant can process for permanent residence.

This month all categories are current, including, unskilled workers, and employment based applicants from China, India and Mexico.
For the most recent visa bulletin, click here
http://www.travel.state.gov/visa_bulletin.html