Tonga | Life expectancy at birth, total (years)

Life expectancy at birth indicates the number of years a newborn infant would live if prevailing patterns of mortality at the time of its birth were to stay the same throughout its life. Development relevance: Mortality rates for different age groups (infants, children, and adults) and overall mortality indicators (life expectancy at birth or survival to a given age) are important indicators of health status in a country. Because data on the incidence and prevalence of diseases are frequently unavailable, mortality rates are often used to identify vulnerable populations. And they are among the indicators most frequently used to compare socioeconomic development across countries. Limitations and exceptions: Annual data series from United Nations Population Division's World Population Prospects are interpolated data from 5-year period data. Therefore they may not reflect real events as much as observed data. Statistical concept and methodology: Life expectancy at birth used here is the average number of years a newborn is expected to live if mortality patterns at the time of its birth remain constant in the future. It reflects the overall mortality level of a population, and summarizes the mortality pattern that prevails across all age groups in a given year. It is calculated in a period life table which provides a snapshot of a population's mortality pattern at a given time. It therefore does not reflect the mortality pattern that a person actually experiences during his/her life, which can be calculated in a cohort life table. High mortality in young age groups significantly lowers the life expectancy at birth. But if a person survives his/her childhood of high mortality, he/she may live much longer. For example, in a population with a life expectancy at birth of 50, there may be few people dying at age 50. The life expectancy at birth may be low due to the high childhood mortality so that once a person survives his/her childhood, he/she may live much longer than 50 years.
Publisher
The World Bank
Origin
Kingdom of Tonga
Records
63
Source
Tonga | Life expectancy at birth, total (years)
1960 58.231
1961 58.589
1962 59.085
1963 59.551
1964 60.054
1965 60.58
1966 61.132
1967 61.66
1968 62.185
1969 62.737
1970 63.232
1971 63.661
1972 63.983
1973 64.242
1974 64.595
1975 64.844
1976 65.127
1977 65.302
1978 65.578
1979 65.782
1980 65.961
1981 66.132
1982 66.072
1983 66.369
1984 66.482
1985 66.626
1986 66.752
1987 66.884
1988 67.026
1989 67.162
1990 67.294
1991 67.518
1992 67.686
1993 67.855
1994 68.014
1995 68.17
1996 68.323
1997 68.49
1998 68.642
1999 68.809
2000 68.978
2001 69.127
2002 69.335
2003 69.495
2004 69.67
2005 69.768
2006 69.894
2007 70.048
2008 70.164
2009 70.012
2010 70.323
2011 70.381
2012 70.442
2013 70.505
2014 70.54
2015 70.607
2016 70.661
2017 70.713
2018 70.779
2019 70.871
2020 70.928
2021 70.986
2022

Tonga | Life expectancy at birth, total (years)

Life expectancy at birth indicates the number of years a newborn infant would live if prevailing patterns of mortality at the time of its birth were to stay the same throughout its life. Development relevance: Mortality rates for different age groups (infants, children, and adults) and overall mortality indicators (life expectancy at birth or survival to a given age) are important indicators of health status in a country. Because data on the incidence and prevalence of diseases are frequently unavailable, mortality rates are often used to identify vulnerable populations. And they are among the indicators most frequently used to compare socioeconomic development across countries. Limitations and exceptions: Annual data series from United Nations Population Division's World Population Prospects are interpolated data from 5-year period data. Therefore they may not reflect real events as much as observed data. Statistical concept and methodology: Life expectancy at birth used here is the average number of years a newborn is expected to live if mortality patterns at the time of its birth remain constant in the future. It reflects the overall mortality level of a population, and summarizes the mortality pattern that prevails across all age groups in a given year. It is calculated in a period life table which provides a snapshot of a population's mortality pattern at a given time. It therefore does not reflect the mortality pattern that a person actually experiences during his/her life, which can be calculated in a cohort life table. High mortality in young age groups significantly lowers the life expectancy at birth. But if a person survives his/her childhood of high mortality, he/she may live much longer. For example, in a population with a life expectancy at birth of 50, there may be few people dying at age 50. The life expectancy at birth may be low due to the high childhood mortality so that once a person survives his/her childhood, he/she may live much longer than 50 years.
Publisher
The World Bank
Origin
Kingdom of Tonga
Records
63
Source