The US Citizenship and Immigration Services provides annual data with respect to petitions filed, visa approved, by country of birth and type of employment for H-1B Visa. An H-1B visa is a non-immigrant visa that lets companies and offices in the US employ foreign workers who require specialized knowledge or at least a bachelor's degree or work experience. Data pertaining to visas approved and petitions filed across different categories like employment type, country of birth, etc is available in this collection.