| Country or Area | Year | Value | |
|---|
| Afghanistan | 2022 | 1.7 |
| Afghanistan | 2020 | 2.6 |
| Afghanistan | 2019 | 2.6 |
| Afghanistan | 2018 | 2.6 |
| Afghanistan | 2017 | 2.6 |
| Afghanistan | 2016 | 2.6 |
| Afghanistan | 2015 | 2.5 |
| Afghanistan | 2014 | 2.5 |
| Afghanistan | 2013 | 2.5 |
| Afghanistan | 2012 | 2.5 |
| Afghanistan | 2011 | 2.5 |
| Afghanistan | 2010 | 2.4 |
| Afghanistan | 2009 | 2.4 |
| Afghanistan | 2008 | 2.2 |
| Afghanistan | 2007 | 2.2 |
| Afghanistan | 2006 | 2.3 |
| Africa Eastern and Southern | 2022 | 2.7210526315789467 |
| Africa Eastern and Southern | 2021 | 2.736842105263158 |
| Africa Eastern and Southern | 2020 | 2.768421052631579 |
| Africa Eastern and Southern | 2019 | 2.7894736842105265 |
| Africa Eastern and Southern | 2018 | 2.877777777777778 |
| Africa Eastern and Southern | 2017 | 2.836842105263158 |
| Africa Eastern and Southern | 2016 | 2.916666666666667 |
| Africa Eastern and Southern | 2015 | 2.9111111111111114 |
| Africa Eastern and Southern | 2014 | 2.9277777777777785 |
| Africa Eastern and Southern | 2013 | 2.847368421052632 |
| Africa Eastern and Southern | 2012 | 2.868421052631579 |
| Africa Eastern and Southern | 2011 | 2.916666666666667 |
| Africa Eastern and Southern | 2010 | 2.933333333333334 |
| Africa Eastern and Southern | 2009 | 2.95 |
| Africa Eastern and Southern | 2008 | 2.9444444444444446 |
| Africa Eastern and Southern | 2007 | 2.961111111111111 |
| Africa Eastern and Southern | 2006 | 2.9611111111111104 |
| Africa Eastern and Southern | 2005 | 2.972222222222222 |
| Africa Western and Central | 2022 | 3.0550000000000006 |
| Africa Western and Central | 2021 | 3.0650000000000004 |
| Africa Western and Central | 2020 | 3.0500000000000007 |
| Africa Western and Central | 2019 | 3.0500000000000003 |
| Africa Western and Central | 2018 | 3.0149999999999997 |
| Africa Western and Central | 2017 | 3.0149999999999997 |
| Africa Western and Central | 2016 | 3.015 |
| Africa Western and Central | 2015 | 3.0100000000000007 |
| Africa Western and Central | 2014 | 2.99 |
| Africa Western and Central | 2013 | 3.0000000000000004 |
| Africa Western and Central | 2012 | 2.9900000000000007 |
| Africa Western and Central | 2011 | 3.04 |
| Africa Western and Central | 2010 | 2.995 |
| Africa Western and Central | 2009 | 2.9749999999999996 |
| Africa Western and Central | 2008 | 2.952631578947369 |
| Africa Western and Central | 2007 | 2.9789473684210526 |
