{
  "industry": "Primary Metal Manufacturing",
  "naics": "331",
  "metro": "Tucson, AZ",
  "grain_of_margin": "national",
  "national_net_margin_pct": 16.2,
  "metro_establishments": 6.0,
  "metro_employment": 194.0,
  "metro_avg_weekly_wage": 1181.0,
  "note": "Margin is national. Counts + wage are metro (CBSA) grain. No local margin exists."
}