Some interesting link:
Form I-140 Immigrant Petition for Alien Worker Performance Data by Class and Beneficiary Country of Birth
This quarterly report shows Immigrant Petition for Alien Worker performance data for consular-processed I-140s and does not include any associated dependents. The number of cases approved are displayed by class and beneficiary country of birth.
PDF:
http://www.uscis.gov/USCIS/Resources...-2011-june.pdf
CSV:
http://www.uscis.gov/USCIS/Resources...-2011-june.csv