| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 64.1 |
| 2020 | 65.7 |
| 2019 | 67.3 |
| 2018 | 68.8 |
| 2017 | 70.2 |
| 2016 | 71.4 |
| 2015 | 72.2 |
| 2014 | 72.9 |
| 2013 | 73.6 |
| 2012 | 74.4 |
| 2011 | 75.5 |
| 2010 | 76.6 |
| 2009 | 77.9 |
| 2008 | 79.6 |
| 2007 | 81.4 |
| 2006 | 83.4 |
| 2005 | 86 |
| 2004 | 88.9 |
| 2003 | 91.9 |
| 2002 | 94.9 |
| 2001 | 97.9 |
| 2000 | 100.8 |
| 1999 | 103.2 |
| 1998 | 105.6 |
| 1997 | 108.1 |
| 1996 | 109.8 |
| 1995 | 111.2 |
| 1994 | 112.1 |
| 1993 | 112.7 |
| 1992 | 112.9 |
| 1991 | 113.2 |
| 1990 | 113.5 |
| 1989 | 113.8 |
| 1988 | 113.8 |
| 1987 | 113.6 |
| 1986 | 113.4 |
| 1985 | 113 |
| 1984 | 112.9 |
| 1983 | 113 |
| 1982 | 113.6 |
| 1981 | 114.7 |
| 1980 | 116.3 |
| 1979 | 118.4 |
| 1978 | 121.2 |
| 1977 | 124.7 |
| 1976 | 128.7 |
| 1975 | 133 |
| 1974 | 137.5 |
| 1973 | 142.2 |
| 1972 | 146.9 |
| 1971 | 151.6 |
| 1970 | 156 |
| 1969 | 160.3 |
| 1968 | 164.3 |
| 1967 | 168.2 |
| 1966 | 172 |
| 1965 | 175.9 |
| 1964 | 180 |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |