{
  "industry": "Construction (all)",
  "naics": "23",
  "metro": "Chicago-Naperville-Elgin, IL-IN",
  "grain_of_margin": "national",
  "national_net_margin_pct": 14.8,
  "metro_establishments": 22707.0,
  "metro_employment": 180543.0,
  "metro_avg_weekly_wage": 1865.0,
  "note": "Margin is national. Counts + wage are metro (CBSA) grain. No local margin exists."
}