Sierra Leone · Infant Mortality, Under Age 1 (WHO)
54.62024
Unit: per 1,000 live births. Publisher measure: Infant mortality rate (probability of dying between birth and age 1 per 1000 live births).
Infant mortality probability before the first birthday (age 0–11 months), both sexes, expressed per 1,000 live births under reference-year mortality conditions.
Measurement basis: UN Inter-agency Group for Child Mortality Estimation (UN IGME) modelled or adjusted mortality probabilities/rates, disseminated by WHO.
Reference-period cadence: annual.
Source update cadence: annual. This does not establish a publication date for an individual reading.
Displayed values are rounded, with extra precision when needed to keep a positive estimate positive. Downloads retain the full numeric estimate and the publisher's original display text separately.
A “<” sign means strictly below the stated number. Numeric readings and uncertainty endpoints keep their own comparison signs. A number without a sign does not establish certainty or an observed outcome.
World Health Organization (Global Health Observatory); retrieved 2026-09-07. Retrieval time is separate from an official publisher release vintage.
Download this immutable source capture · Source and coverage corrections
One row per country, indicator and year, with raw values, source links and reuse notices. Thresholds have an empty numeric value and separate number/operator fields; value_kind distinguishes upper bounds from absent readings.
History and uncertainty
Charts plot numeric readings. Reported upper bounds create gaps; their values, uncertainty endpoints and source notes remain available in the table and downloads.
Reported estimates and uncertainty · 69 rows
Each comparison sign applies to its own reading or uncertainty endpoint. Values retain source precision. “Not reported” identifies an absent reading or uncertainty endpoint in this source capture.
| Country | Year | Reading | Lower endpoint | Upper endpoint | Publisher note |
|---|---|---|---|---|---|
| Sierra Leone | 1956 | 170.156304995 | 140.243267943 | 207.511157384 | — |
| Sierra Leone | 1957 | 169.029942706 | 142.813876983 | 201.143002888 | — |
| Sierra Leone | 1958 | 167.720491664 | 144.817969692 | 195.347940685 | — |
| Sierra Leone | 1959 | 166.822164767 | 146.564841418 | 190.376275832 | — |
| Sierra Leone | 1960 | 165.747070884 | 147.923212917 | 186.565232706 | — |
| Sierra Leone | 1961 | 164.744536099 | 148.592337461 | 182.980375944 | — |
| Sierra Leone | 1962 | 163.610245202 | 148.668583601 | 180.571351899 | — |
| Sierra Leone | 1963 | 162.443491963 | 148.429340353 | 177.845980155 | — |
| Sierra Leone | 1964 | 161.21901301 | 147.534961787 | 175.923642847 | — |
| Sierra Leone | 1965 | 159.762509091 | 146.317405699 | 174.424606081 | — |
| Sierra Leone | 1966 | 158.287633995 | 144.723319495 | 172.953592331 | — |
| Sierra Leone | 1967 | 156.768332216 | 143.134840644 | 171.728855542 | — |
| Sierra Leone | 1968 | 155.281547511 | 141.372901062 | 170.360141339 | — |
| Sierra Leone | 1969 | 153.859405424 | 139.777234787 | 169.14149971 | — |
| Sierra Leone | 1970 | 152.508922609 | 138.305950006 | 167.877631422 | — |
| Sierra Leone | 1971 | 151.049216399 | 136.973453269 | 166.445835629 | — |
| Sierra Leone | 1972 | 149.734050904 | 135.695581249 | 164.908976266 | — |
| Sierra Leone | 1973 | 148.444519752 | 134.366312259 | 163.570778225 | — |
| Sierra Leone | 1974 | 147.435768603 | 133.174829978 | 162.257553165 | — |
| Sierra Leone | 1975 | 146.187433988 | 132.105011815 | 161.155911054 | — |
| Sierra Leone | 1976 | 145.094163126 | 131.160913177 | 159.928689502 | — |
| Sierra Leone | 1977 | 144.016354999 | 130.167506683 | 158.793465208 | — |
| Sierra Leone | 1978 | 142.92025284 | 129.077485107 | 157.61950168 | — |
| Sierra Leone | 1979 | 141.888701351 | 128.321077578 | 156.705506783 | — |
| Sierra Leone | 1980 | 140.912895051 | 127.362711843 | 155.713108423 | — |
| Sierra Leone | 1981 | 140.097024063 | 126.657126621 | 154.543634667 | — |
| Sierra Leone | 1982 | 139.334727045 | 126.074211827 | 153.460458908 | — |
| Sierra Leone | 1983 | 138.650143412 | 125.604998326 | 152.278595731 | — |
| Sierra Leone | 1984 | 138.062211636 | 125.347018795 | 151.343006281 | — |
| Sierra Leone | 1985 | 137.491109678 | 125.003135432 | 150.408924769 | — |
| Sierra Leone | 1986 | 136.942494127 | 124.965680521 | 149.4434406 | — |
| Sierra Leone | 1987 | 136.382786048 | 124.813919629 | 148.379448292 | — |
| Sierra Leone | 1988 | 135.880943658 | 124.759970807 | 147.520912242 | — |
| Sierra Leone | 1989 | 135.617184365 | 124.922650137 | 146.731504938 | — |
| Sierra Leone | 1990 | 135.353782035 | 125.118408309 | 146.111502302 | — |
| Sierra Leone | 1991 | 135.08960209 | 125.212654492 | 145.620333658 | — |
| Sierra Leone | 1992 | 134.791139644 | 125.166430616 | 145.059144366 | — |
| Sierra Leone | 1993 | 134.48145865 | 125.135182996 | 144.376213371 | — |
| Sierra Leone | 1994 | 133.839479366 | 124.668400207 | 143.723029928 | — |
| Sierra Leone | 1995 | 132.911410815 | 123.818058758 | 142.647373829 | — |
| Sierra Leone | 1996 | 131.586727375 | 122.658417951 | 141.120032139 | — |
| Sierra Leone | 1997 | 129.955485005 | 121.2698221 | 139.372855993 | — |
| Sierra Leone | 1998 | 127.970995992 | 119.488321139 | 137.116078116 | — |
| Sierra Leone | 1999 | 125.859381205 | 117.434720689 | 134.720665844 | — |
| Sierra Leone | 2000 | 123.385537339 | 115.179306836 | 132.09192867 | — |
| Sierra Leone | 2001 | 120.81321134 | 112.733061053 | 129.442033704 | — |
| Sierra Leone | 2002 | 118.210137626 | 110.226732043 | 126.585510162 | — |
| Sierra Leone | 2003 | 115.371797753 | 107.534124671 | 123.560076613 | — |
| Sierra Leone | 2004 | 112.363907795 | 104.726304986 | 120.369241965 | — |
| Sierra Leone | 2005 | 109.254604577 | 101.801939952 | 117.092428623 | — |
| Sierra Leone | 2006 | 105.880651869 | 98.60631218 | 113.54601543 | — |
| Sierra Leone | 2007 | 102.306276991 | 95.265828657 | 109.76616804 | — |
| Sierra Leone | 2008 | 98.591112567 | 91.681888065 | 105.893564269 | — |
| Sierra Leone | 2009 | 94.723293426 | 87.982488026 | 101.998915095 | — |
| Sierra Leone | 2010 | 90.839103503 | 84.228398701 | 97.943941932 | — |
| Sierra Leone | 2011 | 87.00794443 | 80.515697888 | 94.146479508 | — |
| Sierra Leone | 2012 | 83.435950495 | 77.016760594 | 90.675164806 | — |
| Sierra Leone | 2013 | 80.08323921 | 73.673510784 | 87.431739577 | — |
| Sierra Leone | 2014 | 77.758140209 | 71.095380474 | 85.33110782 | — |
| Sierra Leone | 2015 | 76.949040611 | 69.799315877 | 85.02663981 | — |
| Sierra Leone | 2016 | 71.308232646 | 64.063858738 | 79.666435108 | — |
| Sierra Leone | 2017 | 68.709967422 | 60.853278711 | 77.735903278 | — |
| Sierra Leone | 2018 | 66.258059131 | 57.730722243 | 76.065160869 | — |
| Sierra Leone | 2019 | 64.041659098 | 54.870873046 | 74.663836883 | — |
| Sierra Leone | 2020 | 61.924047259 | 52.045030096 | 73.528498004 | — |
| Sierra Leone | 2021 | 59.936647861 | 49.227041397 | 73.112559884 | — |
| Sierra Leone | 2022 | 58.063102818 | 46.474862085 | 72.76110762 | — |
| Sierra Leone | 2023 | 56.302289835 | 43.709343636 | 72.730060612 | — |
| Sierra Leone | 2024 | 54.595852198 | 41.037344614 | 72.50378806 | — |
One row per country, indicator and year, with raw values, source links and reuse notices. Thresholds have an empty numeric value and separate number/operator fields; value_kind distinguishes upper bounds from absent readings.