| Country or Area | Year | Value | |
|---|
| Afghanistan | 2022 | 1.333333 |
| Afghanistan | 2020 | 3 |
| Afghanistan | 2019 | 3 |
| Afghanistan | 2018 | 3 |
| Afghanistan | 2017 | 3 |
| Afghanistan | 2016 | 3 |
| Afghanistan | 2015 | 3 |
| Afghanistan | 2014 | 3 |
| Afghanistan | 2013 | 3 |
| Afghanistan | 2012 | 3 |
| Afghanistan | 2011 | 3 |
| Afghanistan | 2010 | 3 |
| Afghanistan | 2009 | 3.3333333333333335 |
| Afghanistan | 2008 | 3.2 |
| Afghanistan | 2007 | 3.1666666666666665 |
| Afghanistan | 2006 | 3.3333333333333335 |
| Africa Eastern and Southern | 2022 | 2.894736947368421 |
| Africa Eastern and Southern | 2021 | 2.912280736842105 |
| Africa Eastern and Southern | 2020 | 2.903508771929825 |
| Africa Eastern and Southern | 2019 | 2.9122807017543857 |
| Africa Eastern and Southern | 2018 | 2.9351851851851856 |
| Africa Eastern and Southern | 2017 | 2.912280701754385 |
| Africa Eastern and Southern | 2016 | 3.0277777777777777 |
| Africa Eastern and Southern | 2015 | 3.129629259259259 |
| Africa Eastern and Southern | 2014 | 3.2129622222222216 |
| Africa Eastern and Southern | 2013 | 3.184210526315789 |
| Africa Eastern and Southern | 2012 | 3.2192982456140355 |
| Africa Eastern and Southern | 2011 | 3.287037037037037 |
| Africa Eastern and Southern | 2010 | 3.314814814814815 |
| Africa Eastern and Southern | 2009 | 3.342592592592593 |
| Africa Eastern and Southern | 2008 | 3.2888888888888888 |
| Africa Eastern and Southern | 2007 | 3.287037037037037 |
| Africa Eastern and Southern | 2006 | 3.261111111111111 |
| Africa Eastern and Southern | 2005 | 3.2407407407407414 |
| Africa Western and Central | 2022 | 3.4083333000000002 |
| Africa Western and Central | 2021 | 3.3999999499999993 |
| Africa Western and Central | 2020 | 3.3833333333333337 |
| Africa Western and Central | 2019 | 3.35 |
| Africa Western and Central | 2018 | 3.3416666666666663 |
| Africa Western and Central | 2017 | 3.3500000000000005 |
| Africa Western and Central | 2016 | 3.3333333333333335 |
| Africa Western and Central | 2015 | 3.408333499999999 |
| Africa Western and Central | 2014 | 3.4500000000000006 |
| Africa Western and Central | 2013 | 3.5166666666666666 |
| Africa Western and Central | 2012 | 3.5333333333333328 |
| Africa Western and Central | 2011 | 3.5083333333333337 |
| Africa Western and Central | 2010 | 3.4416666666666664 |
| Africa Western and Central | 2009 | 3.4249999999999994 |
| Africa Western and Central | 2008 | 3.4368421052631577 |
| Africa Western and Central | 2007 | 3.4210526315789473 |
