Primary sources (WHO)
1) Smoking prevalence indicator page (WHO Data Hub): https://data.who.int/indicators/i/847662C/75DDA77
2) Smoking prevalence dataset CSV (WHO Data Hub): https://srhdpeuwpubsa.blob.core.windows.net/whdh/DATADOT/INDICATOR/75DDA77_ALL_LATEST.csv
3) Life expectancy indicator page (WHO Data Hub): https://data.who.int/indicators/i/A21CFC2/90E2E48
4) Life expectancy dataset CSV (WHO Data Hub): https://srhdpeuwpubsa.blob.core.windows.net/whdh/DATADOT/INDICATOR/90E2E48_ALL_LATEST.csv

