| 年份 | 尼日利亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.00800832 |
| 2020 | 0.00499659 |
| 2019 | 0.00519322 |
| 2018 | 0.0139799 |
| 2017 | 0.0171043 |
| 2016 | 0.00381604 |
| 2015 | 0.00123317 |
| 2014 | 0.00536548 |
| 2013 | 0.021751 |
| 2012 | 0.0208 |
| 2011 | 0.0180945 |
| 2010 | 0.0170112 |
| 2009 | 0.00673263 |
| 2008 | 0.00317538 |
| 2007 | 0.00617602 |
| 2006 | 0.00145349 |
| 2005 | 0.00128803 |
| 2004 | 2.78718E-5 |
| 2003 | 6.28506E-5 |
| 2002 | 0.000276344 |
| 2001 | 0.000272515 |
| 2000 | 0.000153346 |
| 1999 | 8.38594E-5 |
| 1998 | 3.18946E-5 |
| 1997 | 2.40743E-5 |
| 1996 | 4.21835E-5 |
| 1995 | 1.58702E-5 |
| 1994 | - |
| 1993 | - |
| 1992 | - |
| 1991 | - |
| 1990 | - |
| 1989 | - |
| 1988 | - |
| 1987 | 3.72024E-5 |
| 1986 | 7.34728E-6 |
| 1985 | 0.00322447 |
| 1984 | 0.00390065 |
| 1983 | 0.00553116 |
| 1982 | 0.00419903 |
| 1981 | 0.00525672 |
| 1980 | 0.0279646 |
| 1979 | 0.11136 |
| 1978 | 0.100227 |
| 1977 | 0.0903012 |
| 1976 | 0.019983 |
| 1975 | 0.0184232 |
| 1974 | 0.0196023 |
| 1973 | 0.000820455 |
| 1972 | 0.000347624 |
| 1971 | 0.000269085 |
| 1970 | 0.0214594 |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |