| 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 |