Tableau de données
| 1953 | 344 M | 1980 | 2,26 Md | 2004 | 9,78 Md |
| 1957 | 605 M | 1981 | 2,52 Md | 2005 | 13,6 Md |
| 1958 | 411 M | 1982 | 3,03 Md | 2006 | 16,4 Md |
| 1959 | 383 M | 1983 | 2,08 Md | 2007 | 20,5 Md |
| 1960 | 383 M | 1984 | 2,01 Md | 2008 | 24,5 Md |
| 1961 | 342 M | 1985 | 2,69 Md | 2009 | 25,6 Md |
| 1962 | 387 M | 1986 | 2,76 Md | 2010 | 34 Md |
| 1963 | 442 M | 1987 | 4,32 Md | 2011 | 36,9 Md |
| 1964 | 354 M | 1988 | 5,87 Md | 2012 | 34 Md |
| 1965 | 633 M | 1989 | 8,76 Md | 2013 | 32,9 Md |
| 1966 | 718 M | 1990 | 9,24 Md | 2014 | 32,7 Md |
| 1967 | 746 M | 1991 | 6,69 Md | 2015 | 24,6 Md |
| 1968 | 755 M | 1992 | 4,99 Md | 2016 | 24,2 Md |
| 1969 | 817 M | 1993 | 7,1 Md | 2017 | 29,3 Md |
| 1970 | 1,03 Md | 1994 | 10,6 Md | 2018 | 28,2 Md |
| 1971 | 1,08 Md | 1995 | 14,3 Md | 2019 | 25,9 Md |
| 1972 | 1,2 Md | 1996 | 14,1 Md | 2020 | 19,6 Md |
| 1973 | 1,51 Md | 1997 | 13,9 Md | 2021 | 19,2 Md |
| 1974 | 1,79 Md | 1998 | 14,4 Md | 2022 | 20,5 Md |
| 1975 | 2,14 Md | 1999 | 9,87 Md | 2023 | 21,8 Md |
| 1976 | 2,58 Md | 2000 | 11,3 Md | 2024 | 21 Md |
| 1977 | 2,5 Md | 2001 | 10,9 Md | 2025 | 23,9 Md |
| 1978 | 2,69 Md | 2002 | 9,66 Md | | |
| 1979 | 2,83 Md | 2003 | 8,39 Md | | |
Tableau de données
| 1953 | 3,6% | 1980 | 1,1% | 2004 | 1,5% |
| 1957 | 4,4% | 1981 | 1,1% | 2005 | 1,5% |
| 1958 | 4,1% | 1982 | 1,3% | 2006 | 1,5% |
| 1959 | 3% | 1983 | 1,3% | 2007 | 1,5% |
| 1960 | 2,7% | 1984 | 1,2% | 2008 | 1,4% |
| 1961 | 2,4% | 1985 | 1,4% | 2009 | 1,5% |
| 1962 | 2,4% | 1986 | 1,2% | 2010 | 1,5% |
| 1963 | 2,3% | 1987 | 1,7% | 2011 | 1,4% |
| 1964 | 2% | 1988 | 2,1% | 2012 | 1,4% |
| 1965 | 3,4% | 1989 | 2,7% | 2013 | 1,3% |
| 1966 | 3% | 1990 | 2,4% | 2014 | 1,3% |
| 1967 | 2,9% | 1991 | 2% | 2015 | 1,4% |
| 1968 | 2,6% | 1992 | 1,5% | 2016 | 1,3% |
| 1969 | 2,6% | 1993 | 1,9% | 2017 | 1,4% |
| 1970 | 2,9% | 1994 | 2% | 2018 | 1,5% |
| 1971 | 2,6% | 1995 | 1,9% | 2019 | 1,4% |
| 1972 | 2,4% | 1996 | 1,7% | 2020 | 1,3% |
| 1973 | 2,2% | 1997 | 1,6% | 2021 | 1,1% |
| 1974 | 1,9% | 1998 | 1,7% | 2022 | 1,1% |
| 1975 | 2% | 1999 | 1,6% | 2023 | 1% |
| 1976 | 2% | 2000 | 1,7% | 2024 | 1% |
| 1977 | 1,7% | 2001 | 2% | 2025 | 1,1% |
| 1978 | 1,6% | 2002 | 1,9% | | |
| 1979 | 1,5% | 2003 | 1,5% | | |