| Country or Area | Year | Value | |
|---|
| Afghanistan | 2020 | 4.4633951754095955 |
| Afghanistan | 2019 | 4.940915590272396 |
| Afghanistan | 2018 | 5.285156636760751 |
| Afghanistan | 2017 | 5.799058814400429 |
| Afghanistan | 2016 | 4.869042941769669 |
| Afghanistan | 2015 | 4.125012960574594 |
| Afghanistan | 2014 | 2.3121883667243157 |
| Afghanistan | 2013 | 1.45293353564213 |
| Afghanistan | 2012 | 1.582773620988295 |
| Afghanistan | 2011 | 1.2658181109650606 |
| Afghanistan | 2010 | 2.035234983471188 |
| Afghanistan | 2009 | 0.5005453822221908 |
| Afghanistan | 2008 | 0.6036335749288201 |
| Africa Eastern and Southern | 2021 | 54.26923252781381 |
| Africa Eastern and Southern | 2020 | 58.088055611185936 |
| Africa Eastern and Southern | 2019 | 58.333879433514596 |
| Africa Eastern and Southern | 2018 | 61.27570315006181 |
| Africa Eastern and Southern | 2017 | 60.26052777198753 |
| Africa Eastern and Southern | 2016 | 56.59748731035221 |
| Africa Eastern and Southern | 2015 | 57.706631843414954 |
| Africa Eastern and Southern | 2014 | 58.36934410610677 |
| Africa Eastern and Southern | 2013 | 54.17251504888281 |
| Africa Eastern and Southern | 2012 | 51.74408354571876 |
| Africa Eastern and Southern | 2011 | 44.946613798523785 |
| Africa Eastern and Southern | 2010 | 53.472467696769186 |
| Africa Eastern and Southern | 2009 | 52.99290554431693 |
| Africa Eastern and Southern | 2008 | 59.74955257453806 |
| Africa Eastern and Southern | 2007 | 60.17087394877236 |
| Africa Eastern and Southern | 2006 | 66.39555665614864 |
| Africa Eastern and Southern | 2005 | 69.53727974035277 |
| Africa Eastern and Southern | 2004 | 71.86865806377976 |
| Africa Eastern and Southern | 2003 | 87.03541083135954 |
| Africa Eastern and Southern | 2002 | 78.79437306367238 |
| Africa Eastern and Southern | 2001 | 96.8717218394441 |
| Africa Eastern and Southern | 2000 | 102.01967314855807 |
| Africa Eastern and Southern | 1999 | 122.42159530506049 |
| Africa Eastern and Southern | 1998 | 153.55663266498712 |
| Africa Eastern and Southern | 1997 | 139.36543169930837 |
| Africa Eastern and Southern | 1996 | 175.52565448986113 |
| Africa Eastern and Southern | 1995 | 166.2080739976115 |
| Africa Eastern and Southern | 1994 | 162.2618714199727 |
| Africa Eastern and Southern | 1993 | 148.54913829608194 |
| Africa Eastern and Southern | 1992 | 138.69367678678034 |
| Africa Eastern and Southern | 1991 | 144.07550599373104 |
| Africa Eastern and Southern | 1990 | 147.89313506277932 |
| Africa Eastern and Southern | 1989 | 149.3739123301953 |
| Africa Eastern and Southern | 1988 | 136.21989040337454 |
| Africa Western and Central | 2021 | 10.578100564032434 |
| Africa Western and Central | 2020 | 13.646146553088883 |
| Africa Western and Central | 2019 | 12.9481402780636 |
