Tabella dei dati
| 1957 | 62,7 mln | 1980 | 1,04 mld | 2003 | 2,88 mld |
| 1958 | 65 mln | 1981 | 1,45 mld | 2004 | 2,82 mld |
| 1959 | 55,5 mln | 1982 | 1,44 mld | 2005 | 3,12 mld |
| 1960 | 51,3 mln | 1983 | 1,34 mld | 2006 | 3,27 mld |
| 1961 | 42,5 mln | 1984 | 1,27 mld | 2007 | 3,97 mld |
| 1962 | 43,8 mln | 1985 | 1,08 mld | 2008 | 4,41 mld |
| 1963 | 60,8 mln | 1986 | 894 mln | 2009 | 3,96 mld |
| 1964 | 84,6 mln | 1987 | 1,33 mld | 2010 | 3,85 mld |
| 1965 | 119 mln | 1988 | 856 mln | 2011 | 4,69 mld |
| 1966 | 149 mln | 1989 | 1,02 mld | 2012 | 4,51 mld |
| 1967 | 143 mln | 1990 | 1,13 mld | 2013 | 4,92 mld |
| 1968 | 148 mln | 1991 | 1,57 mld | 2014 | 4,92 mld |
| 1969 | 144 mln | 1992 | 1,77 mld | 2015 | 4,53 mld |
| 1970 | 200 mln | 1993 | 1,92 mld | 2016 | 4,17 mld |
| 1971 | 228 mln | 1994 | 2,12 mld | 2017 | 3,49 mld |
| 1972 | 251 mln | 1995 | 2,44 mld | 2018 | 3,45 mld |
| 1973 | 297 mln | 1996 | 2,42 mld | 2019 | 3,27 mld |
| 1974 | 397 mln | 1997 | 2,09 mld | 2020 | 3,37 mld |
| 1975 | 441 mln | 1998 | 1,16 mld | 2021 | 3,68 mld |
| 1976 | 440 mln | 1999 | 1,66 mld | 2022 | 3,67 mld |
| 1977 | 638 mln | 2000 | 1,53 mld | 2023 | 3,93 mld |
| 1978 | 607 mln | 2001 | 1,93 mld | 2024 | 4,38 mld |
| 1979 | 779 mln | 2002 | 2,24 mld | 2025 | 4,93 mld |
Tabella dei dati
| 1957 | 3,7% | 1980 | 4,2% | 2003 | 2,6% |
| 1958 | 4,1% | 1981 | 5,8% | 2004 | 2,3% |
| 1959 | 3,1% | 1982 | 5,4% | 2005 | 2,2% |
| 1960 | 2,7% | 1983 | 4,4% | 2006 | 2% |
| 1961 | 2,2% | 1984 | 3,8% | 2007 | 2% |
| 1962 | 2,2% | 1985 | 3,5% | 2008 | 1,8% |
| 1963 | 2,4% | 1986 | 3,2% | 2009 | 1,9% |
| 1964 | 3,2% | 1987 | 4,1% | 2010 | 1,5% |
| 1965 | 4% | 1988 | 2,4% | 2011 | 1,6% |
| 1966 | 4,7% | 1989 | 2,6% | 2012 | 1,4% |
| 1967 | 4,5% | 1990 | 2,6% | 2013 | 1,5% |
| 1968 | 4,5% | 1991 | 3,2% | 2014 | 1,5% |
| 1969 | 3,9% | 1992 | 3% | 2015 | 1,5% |
| 1970 | 5,2% | 1993 | 2,9% | 2016 | 1,4% |
| 1971 | 5,4% | 1994 | 2,8% | 2017 | 1,1% |
| 1972 | 5% | 1995 | 2,8% | 2018 | 1% |
| 1973 | 3,9% | 1996 | 2,4% | 2019 | 0,9% |
| 1974 | 4,2% | 1997 | 2,1% | 2020 | 1% |
| 1975 | 4,7% | 1998 | 1,6% | 2021 | 1% |
| 1976 | 4% | 1999 | 2,1% | 2022 | 0,9% |
| 1977 | 4,9% | 2000 | 1,6% | 2023 | 1% |
| 1978 | 3,7% | 2001 | 2,1% | 2024 | 1% |
| 1979 | 3,7% | 2002 | 2,2% | 2025 | 1% |