| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 70.6 |
| 2020 | 72.3 |
| 2019 | 73.9 |
| 2018 | 75.5 |
| 2017 | 77.1 |
| 2016 | 78.3 |
| 2015 | 79.3 |
| 2014 | 80.2 |
| 2013 | 81.1 |
| 2012 | 82 |
| 2011 | 83.2 |
| 2010 | 84.4 |
| 2009 | 86 |
| 2008 | 87.8 |
| 2007 | 89.9 |
| 2006 | 92.4 |
| 2005 | 95 |
| 2004 | 97.9 |
| 2003 | 100.8 |
| 2002 | 103.7 |
| 2001 | 106.6 |
| 2000 | 109.6 |
| 1999 | 112.4 |
| 1998 | 115.2 |
| 1997 | 117.6 |
| 1996 | 119.6 |
| 1995 | 121.1 |
| 1994 | 122.2 |
| 1993 | 123 |
| 1992 | 123.5 |
| 1991 | 123.9 |
| 1990 | 124.2 |
| 1989 | 124.3 |
| 1988 | 124.3 |
| 1987 | 124 |
| 1986 | 123.5 |
| 1985 | 123 |
| 1984 | 122.7 |
| 1983 | 122.7 |
| 1982 | 123.1 |
| 1981 | 124.3 |
| 1980 | 126 |
| 1979 | 128.4 |
| 1978 | 131.3 |
| 1977 | 135 |
| 1976 | 139.1 |
| 1975 | 143.6 |
| 1974 | 148.5 |
| 1973 | 153.4 |
| 1972 | 158.4 |
| 1971 | 163.5 |
| 1970 | 168.2 |
| 1969 | 172.7 |
| 1968 | 176.9 |
| 1967 | 181.2 |
| 1966 | 185.3 |
| 1965 | 189.6 |
| 1964 | 193.9 |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |