| 年份 | 圭亚那 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 16.9 |
| 2020 | 17.4 |
| 2019 | 17.9 |
| 2018 | 18.5 |
| 2017 | 19 |
| 2016 | 19.6 |
| 2015 | 20.2 |
| 2014 | 20.8 |
| 2013 | 21.3 |
| 2012 | 21.9 |
| 2011 | 22.4 |
| 2010 | 22.8 |
| 2009 | 23.1 |
| 2008 | 23.5 |
| 2007 | 23.9 |
| 2006 | 24.3 |
| 2005 | 24.7 |
| 2004 | 25.2 |
| 2003 | 25.6 |
| 2002 | 26.1 |
| 2001 | 26.5 |
| 2000 | 27.1 |
| 1999 | 27.7 |
| 1998 | 28.2 |
| 1997 | 28.8 |
| 1996 | 29.3 |
| 1995 | 29.7 |
| 1994 | 30.1 |
| 1993 | 30.4 |
| 1992 | 30.7 |
| 1991 | 30.9 |
| 1990 | 30.9 |
| 1989 | 31 |
| 1988 | 31 |
| 1987 | 31 |
| 1986 | 31.1 |
| 1985 | 31.1 |
| 1984 | 31.2 |
| 1983 | 31.3 |
| 1982 | 31.5 |
| 1981 | 31.8 |
| 1980 | 32.1 |
| 1979 | 32.4 |
| 1978 | 32.7 |
| 1977 | 33 |
| 1976 | 33.3 |
| 1975 | 33.6 |
| 1974 | 33.9 |
| 1973 | 34.1 |
| 1972 | 34.4 |
| 1971 | 34.7 |
| 1970 | 35 |
| 1969 | 35.2 |
| 1968 | 35.4 |
| 1967 | 35.7 |
| 1966 | 36 |
| 1965 | 36.3 |
| 1964 | 36.8 |
| 1963 | 37.4 |
| 1962 | 38 |
| 1961 | 39 |
| 1960 | 40 |