| 年份 | 意大利 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.121638 |
| 2020 | 0.121123 |
| 2019 | 0.115759 |
| 2018 | 0.111268 |
| 2017 | 0.111276 |
| 2016 | 0.110461 |
| 2015 | 0.108693 |
| 2014 | 0.110678 |
| 2013 | 0.113341 |
| 2012 | 0.11955 |
| 2011 | 0.11317 |
| 2010 | 0.118797 |
| 2009 | 0.118131 |
| 2008 | 0.127459 |
| 2007 | 0.122711 |
| 2006 | 0.126858 |
| 2005 | 0.134209 |
| 2004 | 0.138319 |
| 2003 | 0.138869 |
| 2002 | 0.145236 |
| 2001 | 0.146365 |
| 2000 | 0.148906 |
| 1999 | 0.150133 |
| 1998 | 0.146362 |
| 1997 | 0.145068 |
| 1996 | 0.146535 |
| 1995 | 0.145714 |
| 1994 | 0.146525 |
| 1993 | 0.150444 |
| 1992 | 0.154057 |
| 1991 | 0.156805 |
| 1990 | 0.158888 |
| 1989 | 0.158686 |
| 1988 | 0.158187 |
| 1987 | 0.160154 |
| 1986 | 0.160541 |
| 1985 | 0.159914 |
| 1984 | 0.160791 |
| 1983 | 0.161375 |
| 1982 | 0.167269 |
| 1981 | 0.167535 |
| 1980 | 0.168037 |
| 1979 | 0.16826 |
| 1978 | 0.168302 |
| 1977 | 0.167258 |
| 1976 | 0.16806 |
| 1975 | 0.168287 |
| 1974 | 0.169096 |
| 1973 | 0.169639 |
| 1972 | 0.172725 |
| 1971 | 0.17589 |
| 1970 | 0.22266 |
| 1969 | 0.228268 |
| 1968 | 0.231912 |
| 1967 | 0.234194 |
| 1966 | 0.236943 |
| 1965 | 0.240327 |
| 1964 | 0.243791 |
| 1963 | 0.247288 |
| 1962 | 0.251477 |
| 1961 | 0.25451 |
| 1960 | - |