[OC] I tracked 10,000+ grocery product prices in Norway for over 10 years. Here's how they changed. Visualization

What This Visualization Shows

This data visualization displays "[OC] I tracked 10,000+ grocery product prices in Norway for over 10 years. Here's how they changed." and provides a clear visual representation of the underlying data patterns and trends. The visualization focuses on **Source:** Real purchase data from Norwegian online grocery store [Oda](https://oda.com), tracked via [Odalytics](https://odalytics.no) — a browser extension I built that analyzes grocery order history across households.

**Tools:** Python, Plotly, PostgreSQL (Supabase)

**Dataset:** 10,416 unique products, 142,827 daily price observations, 4,867 orders from real Norwegian households (2014–2026).

**What you're seeing:**

Each line shows how the price of an everyday grocery staple has changed relative to its starting price, indexed to 100 (3-month rolling average). The white dashed line is Norway's official food CPI from Statistics Norway (SSB), also indexed to 100 at January 2015.

**Key findings:**

- A single **cucumber** went from 13 kr to 34 kr — up **163%** since 2015 - **Butter** (TINE Meierismør 500g, Norway's #1 brand) rose from 27 kr to 62 kr — up **132%** since 2016 - A 12-pack of **eggs** more than doubled: 28 kr → 60 kr (+116% since 2019) - **Salmon fillets** (4pc): 48 kr → 90 kr (+86% since 2019)

Meanwhile, the official SSB food CPI rose **47%** over the same period. Individual staple prices have outpaced official food inflation by 2–3.5x.

Why the gap? CPI is a weighted basket that includes substitution effects (people switching to cheaper brands), quality adjustments, and category reweighting. Individual staple products with no close substitutes — like butter or eggs — can rise much faster than the aggregate index suggests.

For context: 1 NOK ≈ 0.09 USD / 0.085 EUR. Norwegian grocery prices are among the highest in Europe (although relatively low when compared to salaries).

**Other data we have beyond prices:**

- **CO₂ emissions per product** using the Danish Climate Database (10,416 products mapped), so users can track their carbon footprint - **Ultra-processed food (NOVA classification)** — every product classified on the NOVA 1–4 scale, so users can track their spend on ultra-processed food (NOVA 4) - **Country of origin** — where each product is actually produced, so users can track which economies they support

Happy to answer any questions about Norwegian grocery prices!, which allows us to understand complex relationships and insights within the data through visual storytelling.

Deep Dive into the Topic

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