| 年份 | 阿曼 |
|---|---|
| 2023 | - |
| 2022 | 2.03521 |
| 2021 | 0.38031 |
| 2020 | -0.328044 |
| 2019 | 1.09866 |
| 2018 | 2.46205 |
| 2017 | 4.4936 |
| 2016 | 6.20788 |
| 2015 | 5.94395 |
| 2014 | 6.51118 |
| 2013 | 9.33539 |
| 2012 | 11.5546 |
| 2011 | 12.0347 |
| 2010 | 7.32857 |
| 2009 | 2.4708 |
| 2008 | 2.47393 |
| 2007 | 2.50859 |
| 2006 | 2.57127 |
| 2005 | 2.65408 |
| 2004 | 1.96418 |
| 2003 | 1.12779 |
| 2002 | 1.18614 |
| 2001 | 1.2605 |
| 2000 | 1.33148 |
| 1999 | 1.40371 |
| 1998 | 1.48094 |
| 1997 | 1.57144 |
| 1996 | 1.6737 |
| 1995 | 1.78466 |
| 1994 | 3.84192 |
| 1993 | 6.54527 |
| 1992 | 7.04767 |
| 1991 | 7.43253 |
| 1990 | 7.81746 |
| 1989 | 8.21081 |
| 1988 | 8.64468 |
| 1987 | 9.11446 |
| 1986 | 9.6647 |
| 1985 | 9.44487 |
| 1984 | 9.05334 |
| 1983 | 9.31091 |
| 1982 | 9.45955 |
| 1981 | 9.49428 |
| 1980 | 9.55917 |
| 1979 | 9.62797 |
| 1978 | 9.62013 |
| 1977 | 9.4904 |
| 1976 | 9.24744 |
| 1975 | 9.01587 |
| 1974 | 8.45248 |
| 1973 | 7.92259 |
| 1972 | 7.95807 |
| 1971 | 7.98799 |
| 1970 | 8.02731 |
| 1969 | 8.06733 |
| 1968 | 8.12173 |
| 1967 | 8.14791 |
| 1966 | 8.17896 |
| 1965 | 8.19764 |
| 1964 | 8.23113 |
| 1963 | 8.22048 |
| 1962 | 8.21518 |
| 1961 | 8.1752 |
| 1960 | - |