| 年份 | 阿曼 |
|---|---|
| 2023 | - |
| 2022 | 1.01407 |
| 2021 | 1.00423 |
| 2020 | 1.00197 |
| 2019 | 0.985509 |
| 2018 | 0.982919 |
| 2017 | 0.974042 |
| 2016 | 0.955682 |
| 2015 | 0.935883 |
| 2014 | 0.916465 |
| 2013 | 0.895943 |
| 2012 | 0.87628 |
| 2011 | 0.864871 |
| 2010 | 0.852549 |
| 2009 | 0.816368 |
| 2008 | 0.76441 |
| 2007 | 0.719894 |
| 2006 | 0.690966 |
| 2005 | 0.677448 |
| 2004 | 0.671913 |
| 2003 | 0.675926 |
| 2002 | 0.687814 |
| 2001 | 0.698786 |
| 2000 | 0.709555 |
| 1999 | 0.720791 |
| 1998 | 0.733564 |
| 1997 | 0.748044 |
| 1996 | 0.761466 |
| 1995 | 0.771704 |
| 1994 | 0.777799 |
| 1993 | 0.7877 |
| 1992 | 0.804779 |
| 1991 | 0.823144 |
| 1990 | 0.842715 |
| 1989 | 0.863444 |
| 1988 | 0.885422 |
| 1987 | 0.907832 |
| 1986 | 0.92883 |
| 1985 | 0.947157 |
| 1984 | 0.963396 |
| 1983 | 0.979222 |
| 1982 | 0.99546 |
| 1981 | 1.0125 |
| 1980 | 1.03003 |
| 1979 | 1.0476 |
| 1978 | 1.065 |
| 1977 | 1.08183 |
| 1976 | 1.09667 |
| 1975 | 1.10872 |
| 1974 | 1.11949 |
| 1973 | 1.12622 |
| 1972 | 1.12751 |
| 1971 | 1.12623 |
| 1970 | 1.12168 |
| 1969 | 1.11291 |
| 1968 | 1.09936 |
| 1967 | 1.0828 |
| 1966 | 1.06727 |
| 1965 | 1.05557 |
| 1964 | 1.04719 |
| 1963 | 1.04255 |
| 1962 | 1.0416 |
| 1961 | 1.04051 |
| 1960 | 1.03605 |