• Industry - 1997 North American Industry Classification System (102), Class of Worker …
• Industry - 1997 North American Industry Classification System (422), Class of Worker …
• Industry - 1997 North American Industry Classification System (23), Occupation - 2001 …
• Industry - North American Industry Classification System 2002 (433), Class of Worker …
• Industry - 1997 North American Industry Classification System (23), Occupation - 2001 …