{
  "industry": "Mining (except Oil & Gas)",
  "naics": "212",
  "metro": "Pittsburgh, PA",
  "grain_of_margin": "national",
  "national_net_margin_pct": 5.4,
  "metro_establishments": 56.0,
  "metro_employment": 1469.0,
  "metro_avg_weekly_wage": null,
  "note": "Margin is national. Counts + wage are metro (CBSA) grain. No local margin exists."
}