| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 75.3692 |
| 2020 | 75.2034 |
| 2019 | 75.0376 |
| 2018 | 74.8729 |
| 2017 | 74.7049 |
| 2016 | 74.5424 |
| 2015 | 74.3733 |
| 2014 | 74.2152 |
| 2013 | 74.0494 |
| 2012 | 73.8858 |
| 2011 | 73.7211 |
| 2010 | 73.5575 |
| 2009 | 73.3917 |
| 2008 | 73.2303 |
| 2007 | 73.0657 |
| 2006 | 72.902 |
| 2005 | 72.7472 |
| 2004 | 72.5792 |
| 2003 | 72.4189 |
| 2002 | 72.2553 |
| 2001 | 72.1005 |
| 2000 | 71.9259 |
| 1999 | 71.7635 |
| 1998 | 71.5999 |
| 1997 | 70.7094 |
| 1996 | 70.5337 |
| 1995 | 70.3569 |
| 1994 | 67.9842 |
| 1993 | 66.9291 |
| 1992 | 66.5327 |
| 1991 | 65.258 |
| 1990 | 64.4663 |
| 1989 | 63.7933 |
| 1988 | 63.6429 |
| 1987 | 63.4331 |
| 1986 | 63.342 |
| 1985 | 63.1136 |
| 1984 | 62.7744 |
| 1983 | 62.4373 |
| 1982 | 62.3187 |
| 1981 | 62.199 |
| 1980 | 62.0804 |
| 1979 | 61.851 |
| 1978 | 61.5128 |
| 1977 | 61.3942 |
| 1976 | 61.526 |
| 1975 | 61.3646 |
| 1974 | 61.2032 |
| 1973 | 61.0407 |
| 1972 | 60.8793 |
| 1971 | 60.7179 |
| 1970 | 60.5554 |
| 1969 | 60.3391 |
| 1968 | 60.0679 |
| 1967 | 59.9054 |
| 1966 | 60.1831 |
| 1965 | 60.1304 |
| 1964 | 59.969 |
| 1963 | 59.8076 |
| 1962 | 59.6451 |
| 1961 | 59.4837 |
| 1960 | - |