{
  "industry": "Gasoline Stations",
  "naics": "447",
  "metro": "Tucson, AZ",
  "grain_of_margin": "national",
  "national_net_margin_pct": 2.0,
  "metro_establishments": 227.0,
  "metro_employment": 2652.0,
  "metro_avg_weekly_wage": null,
  "note": "Margin is national. Counts + wage are metro (CBSA) grain. No local margin exists."
}