Show data table
| 1955 | 12.5M | 1979 | 346M | 2004 | 955M |
| 1956 | 18.1M | 1980 | 503M | 2005 | 963M |
| 1957 | 18.7M | 1981 | 373M | 2006 | 1.01B |
| 1958 | 21.8M | 1982 | 247M | 2007 | 1.15B |
| 1959 | 20.7M | 1983 | 492M | 2008 | 1.17B |
| 1960 | 22.9M | 1984 | 475M | 2009 | 1.43B |
| 1961 | 27.8M | 1985 | 227M | 2010 | 1.59B |
| 1962 | 40.9M | 1986 | 148M | 2011 | 1.63B |
| 1963 | 33.9M | 1987 | 37M | 2012 | 1.76B |
| 1964 | 38.1M | 1988 | 39.3M | 2013 | 1.94B |
| 1965 | 44.6M | 1990 | 214M | 2014 | 2.27B |
| 1966 | 51.4M | 1991 | 229M | 2015 | 2.24B |
| 1967 | 57.7M | 1992 | 443M | 2016 | 2.61B |
| 1968 | 65.6M | 1993 | 453M | 2017 | 2.44B |
| 1969 | 65.1M | 1994 | 637M | 2018 | 2.78B |
| 1970 | 64.5M | 1995 | 746M | 2019 | 2.33B |
| 1971 | 66.9M | 1996 | 736M | 2020 | 432M |
| 1972 | 106M | 1997 | 678M | 2021 | 172M |
| 1973 | 104M | 1998 | 694M | 2022 | 219M |
| 1974 | 179M | 1999 | 830M | 2023 | 286M |
| 1975 | 166M | 2000 | 930M | 2024 | 635M |
| 1976 | 173M | 2001 | 959M | 2025 | 828M |
| 1977 | 126M | 2002 | 907M | | |
| 1978 | 253M | 2003 | 923M | | |
Show data table
| 1964 | 3.7% | 1986 | 5.3% | 2007 | 4.6% |
| 1965 | 3.9% | 1987 | 1.1% | 2008 | 4% |
| 1966 | 4.2% | 1988 | 1.2% | 2009 | 4% |
| 1967 | 4.8% | 1990 | 7.6% | 2010 | 4.1% |
| 1968 | 4.8% | 1991 | 5.2% | 2011 | 4.1% |
| 1969 | 4.6% | 1992 | 8% | 2012 | 4% |
| 1970 | 4.3% | 1993 | 6% | 2013 | 4.1% |
| 1971 | 4% | 1994 | 7% | 2014 | 4.7% |
| 1972 | 5.1% | 1995 | 6.7% | 2015 | 4.5% |
| 1973 | 3.8% | 1996 | 5.7% | 2016 | 5.1% |
| 1976 | 12.1% | 1997 | 4.3% | 2017 | 4.6% |
| 1977 | 4.7% | 1998 | 4% | 2018 | 5.1% |
| 1978 | 8.5% | 1999 | 4.8% | 2019 | 4.7% |
| 1979 | 10.1% | 2000 | 5.4% | 2020 | 3% |
| 1980 | 12.4% | 2001 | 5.4% | 2021 | 1.2% |
| 1981 | 9.6% | 2002 | 4.8% | 2022 | 1% |
| 1982 | 9.3% | 2003 | 4.7% | 2023 | 1.2% |
| 1983 | 13.5% | 2004 | 4.5% | 2024 | 2.3% |
| 1984 | 11% | 2005 | 4.5% | 2025 | 2.5% |
| 1985 | 6.3% | 2006 | 4.6% | | |