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The superscript symbols at the end of NAICS class titles used to signify comparability are:
CAN	Canadian industry only
MEX	Canadian and Mexican industries are comparable
US	Canadian and United States industries are comparable
[Blank]	[No superscript symbol] Canadian, Mexican and United States industries are comparable.


L	22	Utilities

L	221	Utilities ^US

L	2211	Electric Power Generation, Transmission and Distribution
L	22111	Electric Power Generation ^US
L	221111	Hydro-Electric Power Generation ^US
L	221112	Fossil-Fuel Electric Power Generation ^US
L	221113	Nuclear Electric Power Generation ^US
L	221119	Other Electric Power Generation ^US
L	22112	Electric Power Transmission, Control and Distribution ^US
L	221121	Electric Bulk Power Transmission and Control ^US
L	221122	Electric Power Distribution ^US

L	2212	Natural Gas Distribution ^US
L	22121	Natural Gas Distribution ^US
L	221210	Natural Gas Distribution ^US

L	2213	Water, Sewage and Other Systems ^US
L	22131	Water Supply and Irrigation Systems ^US
L	221310	Water Supply and Irrigation Systems ^US
L	22132	Sewage Treatment Facilities ^US
L	221320	Sewage Treatment Facilities ^US
L	22133	Steam and Air-Conditioning Supply ^US
L	221330	Steam and Air-Conditioning Supply ^US