| 年份 | 英国 |
|---|---|
| 2023 | - |
| 2022 | 17.4667 |
| 2021 | 17.6612 |
| 2020 | 17.7883 |
| 2019 | 17.8741 |
| 2018 | 17.9084 |
| 2017 | 17.8761 |
| 2016 | 17.8004 |
| 2015 | 17.7212 |
| 2014 | 17.6724 |
| 2013 | 17.6567 |
| 2012 | 17.6421 |
| 2011 | 17.6294 |
| 2010 | 17.6279 |
| 2009 | 17.6465 |
| 2008 | 17.6909 |
| 2007 | 17.7665 |
| 2006 | 17.8973 |
| 2005 | 18.0758 |
| 2004 | 18.2619 |
| 2003 | 18.4502 |
| 2002 | 18.661 |
| 2001 | 18.8695 |
| 2000 | 19.0578 |
| 1999 | 19.2059 |
| 1998 | 19.3 |
| 1997 | 19.3599 |
| 1996 | 19.4021 |
| 1995 | 19.4497 |
| 1994 | 19.4868 |
| 1993 | 19.4505 |
| 1992 | 19.3282 |
| 1991 | 19.1721 |
| 1990 | 19.0289 |
| 1989 | 18.9327 |
| 1988 | 18.8962 |
| 1987 | 18.9367 |
| 1986 | 19.0893 |
| 1985 | 19.3097 |
| 1984 | 19.5691 |
| 1983 | 19.8859 |
| 1982 | 20.2428 |
| 1981 | 20.6259 |
| 1980 | 21.0245 |
| 1979 | 21.4547 |
| 1978 | 21.9294 |
| 1977 | 22.4351 |
| 1976 | 22.9231 |
| 1975 | 23.3499 |
| 1974 | 23.6925 |
| 1973 | 23.9456 |
| 1972 | 24.1085 |
| 1971 | 24.1543 |
| 1970 | 24.106 |
| 1969 | 24.0167 |
| 1968 | 23.9069 |
| 1967 | 23.7685 |
| 1966 | 23.5971 |
| 1965 | 23.4188 |
| 1964 | 23.2724 |
| 1963 | 23.2004 |
| 1962 | 23.2519 |
| 1961 | 23.3503 |
| 1960 | 23.3592 |