{
  "query": {
    "country": "NZ",
    "item": "milk"
  },
  "status": "ok",
  "price": {
    "currency": "NZD",
    "unit": "per 2 litres",
    "value": 5.05,
    "measure": "average",
    "median": null,
    "typical_low": null,
    "typical_high": null,
    "min": null,
    "max": null
  },
  "sample_size": null,
  "period": {
    "from": "2026-09-01",
    "to": "2026-09-30"
  },
  "confidence": "high",
  "price_type": "official_statistic",
  "statistic": {
    "measure": "average",
    "reference_period": "2026-09"
  },
  "as_of": "2026-10-24T11:04:27.994Z",
  "source": {
    "id": "nz-stats-grocery-prices",
    "name": "Selected price indexes (Food Price Index selected monthly weighted average prices), Stats NZ",
    "publisher": "Stats NZ (Tatauranga Aotearoa)",
    "licence": "Creative Commons Attribution 4.0 International (CC BY 4.0). Stats NZ's copyright page states: \"Unless otherwise specified, content we produce is licensed under the Creative Commons Attribution 4.0 International licence.\"",
    "licence_url": "https://creativecommons.org/licenses/by/4.0/",
    "attribution": "Source: Stats NZ, Selected price indexes, licensed by Stats NZ for reuse under the Creative Commons Attribution 4.0 International licence (https://creativecommons.org/licenses/by/4.0/). This work is based on Stats NZ's data. ProofPrice selects the items and calculates the changes; Stats NZ has not reviewed it.",
    "url": "https://www.stats.govt.nz/information-releases/selected-price-indexes-september-2026/"
  },
  "method": "Stats NZ publishes, with each monthly Selected price indexes release, the national monthly weighted average price of 74 food and drink items. ProofPrice collects the newest release once a day and returns the published average for the latest month unchanged, with the previous month and the same month a year earlier, and the changes we calculate from them. No range is calculated: Stats NZ gives one average and no count of prices behind it. These are averages compiled for price statistics, not receipts.",
  "method_url": "https://proofprice.com/method",
  "summary": "In New Zealand the national weighted average price of \"Milk - standard homogenised, 2 litres\" was NZ$5.05 in September 2026 (Stats NZ selected price indexes, not receipts). That is 7% higher than a year earlier (NZ$4.72 in September 2025). Official average published by Stats NZ (Tatauranga Aotearoa) for 2026-09.",
  "notice": "Information, not a valuation or offer. Ranges describe past recorded prices.",
  "extra": {
    "country_name": "New Zealand",
    "item": {
      "code": "SAP0127",
      "definition": "Milk - standard homogenised, 2 litres",
      "unit": "per 2 litres",
      "asked_for": "milk"
    },
    "what_this_is": "Monthly weighted average price published by Stats NZ for its selected price indexes. Not a receipt and not the price at any one shop.",
    "reference_month": "2026-09",
    "reference_month_label": "September 2026",
    "change_on_year_earlier": {
      "reference_month": "2025-09",
      "value": 4.72,
      "change_percent": 7,
      "change_amount": 0.33
    },
    "change_on_previous_month": {
      "reference_month": "2026-08",
      "value": 5.09,
      "change_percent": -0.8,
      "change_amount": -0.04
    },
    "other_definitions": [
      {
        "item": "calcium enriched milk",
        "definition": "Milk, calcium enriched, 2 litres",
        "unit": "per 2 litres"
      },
      {
        "item": "soy milk",
        "definition": "Soy milk, unflavoured, 1 litre",
        "unit": "per 1 litre"
      }
    ],
    "library_snapshot_date": "2026-09-01",
    "dataset": {
      "title": "Selected price indexes (Food Price Index selected monthly weighted average prices)",
      "url": "https://www.stats.govt.nz/information-releases/selected-price-indexes-september-2026/"
    }
  },
  "answer_id": "ans_b0b52dda3f862100d9a4",
  "method_version": "1",
  "retrieved_at": "2026-10-24T11:04:27.994Z",
  "evidence": {
    "type": "official_statistic",
    "label": "Official published average",
    "meaning": "One average or median that a statistics office or regulator publishes for a reference period: it describes a group, not a distribution, and says nothing about any single price."
  },
  "reliability": "official_median_no_count",
  "data_as_of": "2026-09-30",
  "data_age_days": 24,
  "suggestions": [
    "This is one published figure (an average, median, index or listed price) with no record count: use it as a reference point, not as a range of what individuals paid.",
    "For a decision on a specific job or purchase, ask for an itemised quote."
  ]
}