{
  "industry": "Utilities",
  "naics": "22",
  "metro": "Columbia, SC",
  "grain_of_margin": "national",
  "national_net_margin_pct": 9.6,
  "metro_establishments": 97.0,
  "metro_employment": 2527.0,
  "metro_avg_weekly_wage": null,
  "note": "Margin is national. Counts + wage are metro (CBSA) grain. No local margin exists."
}