1123 Update getPopulationData.test_total_population() to account for 2023 population data

[Jonasjjj96]

Changes and Information

Fix: Mismatch in total population due to 2023 data update

The newly released population data for 2023 contains only data from 2023, causing a mismatch in the total population when compared with previous years. This results in an error being thrown during the population data validation process.

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[Jonasjjj96]

Pull Request 1124 could solve this issue