| 年份 | 阿曼 |
|---|---|
| 2023 | - |
| 2022 | 0.320446 |
| 2021 | 0.315215 |
| 2020 | 0.328366 |
| 2019 | 0.342155 |
| 2018 | 0.34294 |
| 2017 | 0.343053 |
| 2016 | 0.351302 |
| 2015 | 0.356174 |
| 2014 | 0.353673 |
| 2013 | 0.353457 |
| 2012 | 0.355265 |
| 2011 | 0.353016 |
| 2010 | 0.352565 |
| 2009 | 0.360963 |
| 2008 | 0.373334 |
| 2007 | 0.383083 |
| 2006 | 0.384867 |
| 2005 | 0.377557 |
| 2004 | 0.364163 |
| 2003 | 0.36141 |
| 2002 | 0.371976 |
| 2001 | 0.381903 |
| 2000 | 0.388944 |
| 1999 | 0.39267 |
| 1998 | 0.391695 |
| 1997 | 0.385537 |
| 1996 | 0.375332 |
| 1995 | 0.36298 |
| 1994 | 0.350207 |
| 1993 | 0.34416 |
| 1992 | 0.347199 |
| 1991 | 0.353884 |
| 1990 | 0.362354 |
| 1989 | 0.372384 |
| 1988 | 0.383686 |
| 1987 | 0.396114 |
| 1986 | 0.411073 |
| 1985 | 0.429376 |
| 1984 | 0.443249 |
| 1983 | 0.450403 |
| 1982 | 0.458486 |
| 1981 | 0.467061 |
| 1980 | 0.47592 |
| 1979 | 0.485298 |
| 1978 | 0.494778 |
| 1977 | 0.504435 |
| 1976 | 0.513131 |
| 1975 | 0.520223 |
| 1974 | 0.525192 |
| 1973 | 0.526627 |
| 1972 | 0.525418 |
| 1971 | 0.523608 |
| 1970 | 0.522354 |
| 1969 | 0.522338 |
| 1968 | 0.523618 |
| 1967 | 0.526136 |
| 1966 | 0.529346 |
| 1965 | 0.531981 |
| 1964 | 0.533858 |
| 1963 | 0.535064 |
| 1962 | 0.535366 |
| 1961 | 0.534709 |
| 1960 | 0.533355 |