| 年份 | 阿曼 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 2.623 |
| 2020 | 2.687 |
| 2019 | 2.776 |
| 2018 | 2.883 |
| 2017 | 2.937 |
| 2016 | 2.946 |
| 2015 | 2.959 |
| 2014 | 2.956 |
| 2013 | 2.949 |
| 2012 | 2.929 |
| 2011 | 2.94 |
| 2010 | 2.943 |
| 2009 | 2.841 |
| 2008 | 2.806 |
| 2007 | 2.813 |
| 2006 | 2.921 |
| 2005 | 3.049 |
| 2004 | 3.2 |
| 2003 | 3.346 |
| 2002 | 3.501 |
| 2001 | 3.69 |
| 2000 | 3.893 |
| 1999 | 4.126 |
| 1998 | 4.344 |
| 1997 | 4.616 |
| 1996 | 4.895 |
| 1995 | 5.19 |
| 1994 | 5.472 |
| 1993 | 5.761 |
| 1992 | 6.045 |
| 1991 | 6.339 |
| 1990 | 6.606 |
| 1989 | 6.874 |
| 1988 | 7.135 |
| 1987 | 7.371 |
| 1986 | 7.584 |
| 1985 | 7.756 |
| 1984 | 7.9 |
| 1983 | 8.022 |
| 1982 | 8.104 |
| 1981 | 8.125 |
| 1980 | 8.096 |
| 1979 | 8.042 |
| 1978 | 7.989 |
| 1977 | 7.939 |
| 1976 | 7.862 |
| 1975 | 7.747 |
| 1974 | 7.617 |
| 1973 | 7.504 |
| 1972 | 7.414 |
| 1971 | 7.35 |
| 1970 | 7.311 |
| 1969 | 7.293 |
| 1968 | 7.286 |
| 1967 | 7.282 |
| 1966 | 7.277 |
| 1965 | 7.271 |
| 1964 | 7.263 |
| 1963 | 7.256 |
| 1962 | 7.251 |
| 1961 | 7.248 |
| 1960 | 7.247 |