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The list includes over 190 countries and territories, providing a useful tool for comparing and understanding global health outcomes. The list is compiled using data from various sources, primarily national census and vital registration systems. Life expectancy is defined as the average number of years a person is expected to live, based on current mortality rates. It is influenced by various factors, including healthcare provision, social and economic conditions, lifestyle choices, and public health measures. The page presents the data in a sortable and searchable table, allowing users to sort the countries by their life expectancy values in either ascending or descending order. Additionally, it provides additional information such as rankings over time and regional comparisons. The list highlights significant disparities in life expectancy between countries and regions. Generally, countries with higher levels of economic development and better healthcare systems tend to have higher life expectancies. However, there are notable exceptions where countries with similar levels of development exhibit substantial differences in life expectancy. The page also notes that life expectancy is not necessarily an indicator of individuals' quality of life. It is worth considering other indicators such as infant mortality rates, educational opportunities, and income levels to obtain a more comprehensive understanding of a country's overall well-being. Overall, the list of countries by life expectancy provides a valuable resource for researchers, policymakers, and those interested in global health. It helps shed light on the factors that contribute to longer and healthier lives, as well as the inequalities that persist globally.