| 年份 | 粗出生率 | 粗死亡率 | 自然增长率 |
|---|---|---|---|
| 1960 | 43.8 | 19.4 | 24.4 |
| 1961 | 44.1 | 18.9 | 25.2 |
| 1962 | 43.5 | 18.3 | 25.2 |
| 1963 | 43.0 | 17.6 | 25.4 |
| 1964 | 42.5 | 16.9 | 25.5 |
| 1965 | 42.2 | 16.3 | 25.9 |
| 1966 | 41.9 | 15.7 | 26.2 |
| 1967 | 40.6 | 15.2 | 25.3 |
| 1968 | 39.2 | 14.8 | 24.4 |
| 1969 | 37.8 | 14.3 | 23.4 |
| 1970 | 36.8 | 13.7 | 23.0 |
| 1971 | 35.8 | 13.2 | 22.6 |
| 1972 | 35.1 | 12.8 | 22.4 |
| 1973 | 34.7 | 12.3 | 22.4 |
| 1974 | 34.6 | 12.0 | 22.6 |
| 1975 | 34.5 | 11.8 | 22.7 |
| 1976 | 34.6 | 11.7 | 22.9 |
| 1977 | 34.9 | 11.9 | 23.1 |
| 1978 | 35.3 | 11.3 | 24.0 |
| 1979 | 35.8 | 11.1 | 24.7 |
| 1980 | 36.3 | 11.1 | 25.2 |
| 1981 | 36.8 | 11.0 | 25.7 |
| 1982 | 37.2 | 11.0 | 26.3 |
| 1983 | 37.5 | 10.9 | 26.6 |
| 1984 | 37.8 | 10.7 | 27.0 |
| 1985 | 38.1 | 10.6 | 27.5 |
| 1986 | 38.0 | 10.4 | 27.6 |
| 1987 | 37.8 | 10.1 | 27.6 |
| 1988 | 37.4 | 9.8 | 27.6 |
| 1989 | 37.1 | 9.5 | 27.5 |
| 1990 | 36.6 | 9.2 | 27.3 |
| 1991 | 36.3 | 8.9 | 27.4 |
| 1992 | 35.6 | 8.6 | 26.9 |
| 1993 | 34.8 | 8.4 | 26.4 |
| 1994 | 34.2 | 8.1 | 26.1 |
| 1995 | 33.7 | 8.0 | 25.7 |
| 1996 | 33.5 | 7.8 | 25.7 |
| 1997 | 32.9 | 7.6 | 25.3 |
| 1998 | 32.2 | 7.4 | 24.8 |
| 1999 | 31.5 | 7.3 | 24.2 |
| 2000 | 30.7 | 7.1 | 23.6 |
| 2001 | 29.9 | 7.0 | 22.9 |
| 2002 | 29.0 | 6.9 | 22.2 |
| 2003 | 28.3 | 6.8 | 21.4 |
| 2004 | 28.6 | 6.9 | 21.7 |
| 2005 | 28.8 | 6.9 | 21.9 |
| 2006 | 29.3 | 7.0 | 22.3 |
| 2007 | 29.9 | 7.1 | 22.8 |
| 2008 | 30.4 | 7.1 | 23.3 |
| 2009 | 30.6 | 7.1 | 23.5 |
| 2010 | 30.8 | 7.1 | 23.7 |
| 2011 | 31.0 | 7.0 | 24.0 |
| 2012 | 30.5 | 6.9 | 23.6 |
| 2013 | 30.1 | 6.8 | 23.2 |
| 2014 | 29.5 | 6.7 | 22.8 |
| 2015 | 29.2 | 6.6 | 22.6 |
| 2016 | 28.9 | 6.5 | 22.3 |
| 2017 | 28.6 | 6.4 | 22.2 |
| 2018 | 28.5 | 6.3 | 22.1 |
| 2019 | 28.1 | 6.3 | 21.8 |
| 2020 | 27.6 | 6.2 | 21.4 |
| 2021 | 27.2 | 6.2 | 21.0 |
2021年，基里巴斯人口粗出生率为27.2‰，粗死亡率为6.2‰，自然增长率为21‰。
