Tabella dei dati
| 1950 | 171 mln | 1976 | 2,44 mld | 2002 | 7,95 mld |
| 1951 | 294 mln | 1977 | 2,5 mld | 2003 | 9,93 mld |
| 1952 | 440 mln | 1978 | 2,82 mld | 2004 | 12 mld |
| 1953 | 462 mln | 1979 | 3,1 mld | 2005 | 13,2 mld |
| 1954 | 417 mln | 1980 | 3,66 mld | 2006 | 14,2 mld |
| 1955 | 432 mln | 1981 | 4,32 mld | 2007 | 17,2 mld |
| 1956 | 445 mln | 1982 | 4,46 mld | 2008 | 18,6 mld |
| 1957 | 438 mln | 1983 | 4,51 mld | 2009 | 19 mld |
| 1958 | 440 mln | 1984 | 4,93 mld | 2010 | 23,2 mld |
| 1959 | 450 mln | 1985 | 4,39 mld | 2011 | 26,6 mld |
| 1960 | 460 mln | 1986 | 4,61 mld | 2012 | 26,2 mld |
| 1961 | 471 mln | 1987 | 5,06 mld | 2013 | 24,8 mld |
| 1962 | 489 mln | 1988 | 5,84 mld | 2014 | 25,8 mld |
| 1963 | 553 mln | 1989 | 6,3 mld | 2015 | 24 mld |
| 1964 | 656 mln | 1990 | 6,7 mld | 2016 | 26,4 mld |
| 1965 | 787 mln | 1991 | 7,02 mld | 2017 | 27,7 mld |
| 1966 | 987 mln | 1992 | 6,88 mld | 2018 | 26,8 mld |
| 1967 | 1,2 mld | 1993 | 6,73 mld | 2019 | 26,1 mld |
| 1968 | 1,32 mld | 1994 | 7,46 mld | 2020 | 27,3 mld |
| 1969 | 1,31 mld | 1995 | 7,67 mld | 2021 | 32,7 mld |
| 1970 | 1,28 mld | 1996 | 8,2 mld | 2022 | 32,4 mld |
| 1971 | 1,33 mld | 1997 | 7,94 mld | 2023 | 32,4 mld |
| 1972 | 1,48 mld | 1998 | 7,11 mld | 2024 | 34,2 mld |
| 1973 | 1,86 mld | 1999 | 7,77 mld | 2025 | 35,3 mld |
| 1974 | 2,13 mld | 2000 | 7,27 mld | | |
| 1975 | 2,27 mld | 2001 | 7,04 mld | | |
Tabella dei dati
| 1950 | 2,9% | 1976 | 2,2% | 2002 | 1,9% |
| 1951 | 3,7% | 1977 | 2,2% | 2003 | 1,8% |
| 1952 | 5,2% | 1978 | 2,2% | 2004 | 1,8% |
| 1953 | 4,8% | 1979 | 2,2% | 2005 | 1,8% |
| 1954 | 4% | 1980 | 2,2% | 2006 | 1,8% |
| 1955 | 3,9% | 1981 | 2,3% | 2007 | 1,8% |
| 1956 | 3,7% | 1982 | 2,4% | 2008 | 1,8% |
| 1957 | 3,3% | 1983 | 2,5% | 2009 | 1,9% |
| 1958 | 3,3% | 1984 | 2,5% | 2010 | 1,8% |
| 1959 | 3,1% | 1985 | 2,5% | 2011 | 1,7% |
| 1960 | 2,4% | 1986 | 2,5% | 2012 | 1,7% |
| 1961 | 2,4% | 1987 | 2,4% | 2013 | 1,6% |
| 1962 | 2,4% | 1988 | 2,2% | 2014 | 1,8% |
| 1963 | 2,4% | 1989 | 2% | 2015 | 1,9% |
| 1964 | 2,6% | 1990 | 2,1% | 2016 | 2,1% |
| 1965 | 3% | 1991 | 2,2% | 2017 | 2% |
| 1966 | 3,5% | 1992 | 2,2% | 2018 | 1,9% |
| 1967 | 3,8% | 1993 | 2,2% | 2019 | 1,9% |
| 1968 | 3,8% | 1994 | 2,1% | 2020 | 2% |
| 1969 | 3,4% | 1995 | 2% | 2021 | 2% |
| 1970 | 3% | 1996 | 1,9% | 2022 | 1,9% |
| 1971 | 2,8% | 1997 | 1,9% | 2023 | 1,9% |
| 1972 | 2,7% | 1998 | 1,9% | 2024 | 1,9% |
| 1973 | 2,4% | 1999 | 1,9% | 2025 | 1,9% |
| 1974 | 2,3% | 2000 | 1,8% | | |
| 1975 | 2,3% | 2001 | 1,9% | | |