| 年份 | 阿曼 |
|---|---|
| 2023 | - |
| 2022 | 0.256992 |
| 2021 | 0.280491 |
| 2020 | 0.298942 |
| 2019 | 0.296133 |
| 2018 | 0.283354 |
| 2017 | 0.272534 |
| 2016 | 0.267292 |
| 2015 | 0.265381 |
| 2014 | 0.260673 |
| 2013 | 0.257587 |
| 2012 | 0.266298 |
| 2011 | 0.288894 |
| 2010 | 0.322722 |
| 2009 | 0.341458 |
| 2008 | 0.334872 |
| 2007 | 0.328409 |
| 2006 | 0.324475 |
| 2005 | 0.323217 |
| 2004 | 0.324054 |
| 2003 | 0.32363 |
| 2002 | 0.32032 |
| 2001 | 0.313693 |
| 2000 | 0.30314 |
| 1999 | 0.290097 |
| 1998 | 0.277125 |
| 1997 | 0.266287 |
| 1996 | 0.256694 |
| 1995 | 0.247322 |
| 1994 | 0.23864 |
| 1993 | 0.234264 |
| 1992 | 0.23415 |
| 1991 | 0.234853 |
| 1990 | 0.236017 |
| 1989 | 0.23776 |
| 1988 | 0.240611 |
| 1987 | 0.244814 |
| 1986 | 0.250786 |
| 1985 | 0.259226 |
| 1984 | 0.265186 |
| 1983 | 0.267202 |
| 1982 | 0.269789 |
| 1981 | 0.273113 |
| 1980 | 0.276606 |
| 1979 | 0.279917 |
| 1978 | 0.283505 |
| 1977 | 0.287036 |
| 1976 | 0.290504 |
| 1975 | 0.29453 |
| 1974 | 0.298802 |
| 1973 | 0.302048 |
| 1972 | 0.30468 |
| 1971 | 0.307629 |
| 1970 | 0.310101 |
| 1969 | 0.31175 |
| 1968 | 0.313041 |
| 1967 | 0.314106 |
| 1966 | 0.314942 |
| 1965 | 0.315049 |
| 1964 | 0.313882 |
| 1963 | 0.31275 |
| 1962 | 0.311297 |
| 1961 | 0.308781 |
| 1960 | 0.305305 |