Country
|
Year of survey
|
---|
1986
|
1987
|
1988
|
1989
|
1990
|
1991
|
1992
|
1993
|
1994
|
1995
|
1996
|
1997
|
1998
|
1999
|
2000
|
2001
|
2002
|
2003
|
2004
|
2005
|
2006
|
2007
|
2008
|
2009
|
2010
|
2011
|
2012
|
2013
|
2014
|
2015
|
---|
Benin
| | | | | | | | | | |
0.23
| | | | |
0.32
| | | | |
0.36
| | | | |
0.34
| | | | |
Burkina Faso
| | | | | | | |
0.25
| | | | | |
0.27
| | | |
0.27
| | | | | | |
0.26
| | | | | |
Burundi
| |
0.23
| | | | | | | | | | | | | | | | | | | | | | |
0.26
| | | | | |
Cameroon
| | | | | |
0.26
| | | | | | |
0.26
| | | | | |
0.26
| | | | | | |
0.26
| | | | |
Chad
| | | | | | | | | | | |
0.36
| | | | | | |
0.34
| | | | | | | | | | |
0.41
|
Comoros
| | | | | | | | | | |
0.26
| | | | | | | | | | | | | | | |
0.28
| | | |
Congo
| | | | | | | | | | | | | | | | | | | |
0.23
| | | | | | |
0.21
| | | |
Cote dIvoire
| | | | | | | | |
0.26
| | | | |
0.25
| | | | | | | | | | | | |
0.23
| | | |
DRC
| | | | | | | | | | | | | | | | | | | | | |
0.23
| | | | | | |
0.23
| |
Ethiopia
| | | | | | | | | | | | | | |
0.30
| | | | |
0.37
| | | | | |
0.35
| | | | |
Gabon
| | | | | | | | | | | | | | |
0.23
| | | | | | | | | | | |
0.20
| | | |
Gambia
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
0.28
| | |
Ghana
| | |
0.31
| | | | |
0.28
| | | | |
0.28
| | | | |
0.25
| | | | |
0.27
| | | | | |
0.25
| |
Guinea
| | | | | | | | | | | | | |
0.32
| | | | | |
0.36
| | | | | | |
0.33
| | | |
Kenya
| | | |
0.27
| | | |
0.24
| | | | |
0.24
| | | | |
0.23
| | | | |
0.25
| | | | | |
0.24
| |
Lesotho
| | | | | | | | | | | | | | | | | | |
0.21
| | | | |
0.22
| | | | |
0.21
| |
Liberia
|
0.27
| | | | | | | | | | | | | | | | | | | | |
0.24
| | | | | |
0.24
| | |
Madagascar
| | | | | | |
0.24
| | | | |
0.24
| | | | | | |
0.23
| | | | |
0.25
| | | | | | |
Malawi
| | | | | | |
0.23
| | | | | | | |
0.25
| | | |
0.24
| | | | | |
0.23
| | | | | |
Mali
| |
0.23
| | | | | | | | |
0.31
| | | | |
0.31
| | | | |
0.34
| | | | | | |
0.34
| | |
Mozambique
| | | | | | | | | | | |
0.24
| | | | | |
0.23
| | | | | | | |
0.23
| | | | |
Namibia
| | | | | | |
0.22
| | | | | | | |
0.22
| | | | | | |
0.20
| | | | | |
0.21
| | |
Niger
| | | | | | |
0.36
| | | | | |
0.33
| | | | | | | |
0.37
| | | | | |
0.37
| | | |
Nigeria
| | | | |
0.44
| | | | | | | | | | | | |
0.35
| | | | |
0.36
| | | | |
0.35
| | |
Rwanda
| | | | | | |
0.23
| | | | | | | |
0.24
| | | | |
0.22
| | |
0.23
| |
0.22
| | | | |
0.22
|
Sao Tome and Principe
| | | | | | | | | | | | | | | | | | | | | | | |
0.20
| | | | | | |
Senegal
|
0.23
| | | | | |
0.28
| | | | |
0.23
| | | | | | | |
0.27
| | | | | |
0.29
|
0.27
| |
0.26
| |
Sierra Leone
| | | | | | | | | | | | | | | | | | | | | | |
0.37
| | | | |
0.34
| | |
Swaziland
| | | | | | | | | | | | | | | | | | | | |
0.21
| | | | | | | | | |
Tanzania
| | | | | | |
0.25
| | | |
0.24
| | |
0.26
| | | | | |
0.25
| | | | |
0.25
| | | | | |
Togo
| | |
0.27
| | | | | | | | | |
0.28
| | | | | | | | | | | | | | | |
0.29
| |
Uganda
| | | |
0.25
| | | | | |
0.26
| | | | | |
0.26
| | | | |
0.24
| | | | |
0.25
| | | | |
Zambia
| | | | | | |
0.20
| | | |
0.20
| | | | |
0.21
| | | | | |
0.22
| | | | | | |
0.22
| |
Zimbabwe
| | |
0.23
| | | | | |
0.23
| | | | |
0.22
| | | | | | |
0.21
| | | | |
0.22
| | | | |
- Figure within table indicate proportion of responses ending in 0 or 5
- Values within table above 0.20 indicate digit preference for 0 or 5
- Empty spaces within table indicate survey not carried out in that year