{
  "industry": "Heavy & Civil Engineering Construction",
  "naics": "237",
  "metro": "Tulsa, OK",
  "grain_of_margin": "national",
  "national_net_margin_pct": 11.2,
  "metro_establishments": 172.0,
  "metro_employment": 5556.0,
  "metro_avg_weekly_wage": 1477.0,
  "note": "Margin is national. Counts + wage are metro (CBSA) grain. No local margin exists."
}