Table 1.
Demographic characteristics of the countries included in this study (United Nations, (2019); The World Bank Group, (n.d.); Worldometer, (n.d.-a), (n.d.-b)).
| Country | Total population | Population density/Km2 | Median age | Life expectancy at birth | World share of population | Economic group |
|---|---|---|---|---|---|---|
| Austria | 9,006,398 | 109 | 43 | 82.05 | 0.12% | High-Income |
| France | 65,273,511 | 119 | 42 | 83.13 | 0.84% | High-Income |
| Germany | 83,783,942 | 240 | 46 | 81.88 | 1.07% | High-Income |
| India | 1,380,004,385 | 464 | 28 | 70.42 | 17.70% | Lower-Middle Income |
| Malta | 441,543 | 1380 | 43 | 83.06 | 0.01% | High-Income |
| Portugal | 10,196,709 | 111 | 46 | 82.65 | 0.13% | High-Income |
| Romania | 19,237,691 | 84 | 43 | 76.50 | 0.25% | High-Income |
| Singapore | 5,850,342 | 8358 | 42 | 86.15 | 0.08% | High-Income |
| Spain | 46,754,778 | 94 | 45 | 83.99 | 0.60% | High-Income |
| Turkey | 84,339,067 | 110 | 32 | 78.45 | 1.08% | Upper-Middle-Income |
| United Kingdom | 67,886,011 | 281 | 40 | 81.77 | 0.87% | High-Income |