| 年份 | 中国香港特别行政区 |
|---|---|
| 2023 | - |
| 2022 | 20.4726 |
| 2021 | 19.6033 |
| 2020 | 18.7604 |
| 2019 | 18.0032 |
| 2018 | 17.3158 |
| 2017 | 16.6938 |
| 2016 | 16.1075 |
| 2015 | 15.4987 |
| 2014 | 14.892 |
| 2013 | 14.3677 |
| 2012 | 13.9362 |
| 2011 | 13.5772 |
| 2010 | 13.2853 |
| 2009 | 13.0493 |
| 2008 | 12.8673 |
| 2007 | 12.7458 |
| 2006 | 12.6219 |
| 2005 | 12.4359 |
| 2004 | 12.2082 |
| 2003 | 11.958 |
| 2002 | 11.691 |
| 2001 | 11.42 |
| 2000 | 11.1683 |
| 1999 | 10.9451 |
| 1998 | 10.7145 |
| 1997 | 10.5014 |
| 1996 | 10.3041 |
| 1995 | 10.0081 |
| 1994 | 9.68314 |
| 1993 | 9.41761 |
| 1992 | 9.16504 |
| 1991 | 8.90465 |
| 1990 | 8.63529 |
| 1989 | 8.3939 |
| 1988 | 8.179 |
| 1987 | 7.94966 |
| 1986 | 7.70849 |
| 1985 | 7.45517 |
| 1984 | 7.2194 |
| 1983 | 7.03266 |
| 1982 | 6.8542 |
| 1981 | 6.65449 |
| 1980 | 6.42055 |
| 1979 | 6.18331 |
| 1978 | 5.96336 |
| 1977 | 5.73134 |
| 1976 | 5.48544 |
| 1975 | 5.24314 |
| 1974 | 5.03283 |
| 1973 | 4.85251 |
| 1972 | 4.68507 |
| 1971 | 4.52528 |
| 1970 | 4.33557 |
| 1969 | 4.12649 |
| 1968 | 3.93549 |
| 1967 | 3.7497 |
| 1966 | 3.56339 |
| 1965 | 3.36739 |
| 1964 | 3.18511 |
| 1963 | 3.0411 |
| 1962 | 2.92121 |
| 1961 | 2.81673 |
| 1960 | 2.70303 |