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Difference in 7-day persistence between the two study weeks.
| Rank | Week 1 (January 4-10, 2021) | Week 2 (January 11-17, 2021) | |||
|
|
Country | Difference | Country | Difference | |
| 1 | Czech Republic | 55.90 | Ireland | 79.33 | |
| 2 | Lithuania | 50.47 | Czech Republic | 72.54 | |
| 3 | San Marino | 49.73 | Slovenia | 58.49 | |
| 4 | United Kingdom | 46.36 | United Kingdom | 52.83 | |
