Primary dataset:
- GSMA Mobile Connectivity Index (MCI) – MCI_data_2025.xlsx
  https://www.mobileconnectivityindex.com/assets/excelData/MCI_data_2025.xlsx

Metric extracted:
- Column: "5G Population Coverage"
- Year used: 2024 (latest year available in the 2025 MCI dataset), treated as a 2025 snapshot for publication.

Processing steps:
1) Read 'Index Scores' sheet; use the second header row to set proper column names.
2) Filter Year == 2024.
3) Convert '5G Population Coverage' to numeric.
4) Rank countries in descending order.
5) Export Top 10 and Top 100 tables; generate two charts:
   - Figure 1: Top 20 (horizontal bar)
   - Figure 2: Distribution by coverage bands
