Guestworker visas issued annually, by program or visa category, 1991–2011
Note: Optional Practical Training (OPT) visa numbers for 2009, 2010, and 2011 are estimated based on the 2008 total reported by the Department of Homeland Security. The initial OPT estimates use the OPT-extension ratio to initial OPT in 2008, and the OPT-STEM extension statistics for 2007–2013 are used to estimate 2009, 2010, and 2011 initial OPT visas.
Source: Department of State (2012) and Department of Homeland Security (2008 and unpublished DHS data)
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