| 年份 | 博茨瓦纳  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 11.5471 | 
| 2021 | 11.7569 | 
| 2020 | 11.9386 | 
| 2019 | 12.1097 | 
| 2018 | 12.2728 | 
| 2017 | 12.4429 | 
| 2016 | 12.6067 | 
| 2015 | 12.7555 | 
| 2014 | 12.8898 | 
| 2013 | 13.0021 | 
| 2012 | 13.0951 | 
| 2011 | 13.1759 | 
| 2010 | 13.2352 | 
| 2009 | 13.2541 | 
| 2008 | 13.2433 | 
| 2007 | 13.228 | 
| 2006 | 13.2291 | 
| 2005 | 13.2501 | 
| 2004 | 13.2884 | 
| 2003 | 13.3404 | 
| 2002 | 13.39 | 
| 2001 | 13.4604 | 
| 2000 | 13.6113 | 
| 1999 | 13.876 | 
| 1998 | 14.2238 | 
| 1997 | 14.608 | 
| 1996 | 14.9887 | 
| 1995 | 15.3368 | 
| 1994 | 15.6566 | 
| 1993 | 15.9918 | 
| 1992 | 16.3901 | 
| 1991 | 16.8225 | 
| 1990 | 17.245 | 
| 1989 | 17.648 | 
| 1988 | 18.0246 | 
| 1987 | 18.3758 | 
| 1986 | 18.7062 | 
| 1985 | 19.0114 | 
| 1984 | 19.2814 | 
| 1983 | 19.5034 | 
| 1982 | 19.6579 | 
| 1981 | 19.7908 | 
| 1980 | 19.9395 | 
| 1979 | 20.0684 | 
| 1978 | 20.1619 | 
| 1977 | 20.2274 | 
| 1976 | 20.2936 | 
| 1975 | 20.4196 | 
| 1974 | 20.6553 | 
| 1973 | 21.0163 | 
| 1972 | 21.4607 | 
| 1971 | 21.8113 | 
| 1970 | 21.8712 | 
| 1969 | 21.6941 | 
| 1968 | 21.4333 | 
| 1967 | 21.1218 | 
| 1966 | 20.7843 | 
| 1965 | 20.4468 | 
| 1964 | 20.2929 | 
| 1963 | 20.328 | 
| 1962 | 20.3762 | 
| 1961 | 20.3949 | 
| 1960 | 20.338 |