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IIR surveys industrial process and manufacturing plants across twelve industries and fourteen North American marketing regions. Shown below are graphs providing plant counts by each marketing region and by industry code.
North American Plant Profile Coverage by Market Region

| 01 - Power |
07 - Chemicals (CPI) |
| 02 - Terminals |
08 - Metals & Minerals |
| 03 - Transmission (Oil & Gas) |
09 - Pulp, Paper & Wood |
| 04 - Production (Oil & Gas) |
10 - Food & Beverage |
| 05 - Alternative Fuel |
12 - Industrial Manufacturing |
| 06 - Petroleum Refining (HPI) |
13 - Pharmaceutical & Biotech |
North American Plant Profile Coverage by Industry

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