Show data table
| 1949 | 2.47M | 1975 | 22.7M | 2001 | 160M |
| 1950 | 3.4M | 1976 | 25.5M | 2002 | 153M |
| 1951 | 5.28M | 1977 | 28.7M | 2003 | 199M |
| 1952 | 8.72M | 1978 | 36.6M | 2004 | 235M |
| 1953 | 9.76M | 1979 | 42.4M | 2005 | 244M |
| 1954 | 11.3M | 1980 | 52.4M | 2006 | 247M |
| 1955 | 12.3M | 1981 | 46.2M | 2007 | 286M |
| 1956 | 7.9M | 1982 | 41.4M | 2008 | 176M |
| 1957 | 8.78M | 1983 | 41.2M | 2009 | 185M |
| 1958 | 8.58M | 1984 | 38.7M | 2010 | 179M |
| 1959 | 8.04M | 1985 | 38.1M | 2011 | 196M |
| 1960 | 5.26M | 1986 | 53.5M | 2012 | 183M |
| 1961 | 5.8M | 1987 | 73.2M | 2013 | 197M |
| 1962 | 7.1M | 1988 | 86M | 2014 | 164M |
| 1963 | 6.96M | 1989 | 76M | 2015 | 159M |
| 1964 | 9.28M | 1990 | 96.7M | 2016 | 166M |
| 1965 | 9.52M | 1991 | 108M | 2017 | 215M |
| 1966 | 9.92M | 1992 | 123M | 2018 | 291M |
| 1967 | 8.23M | 1993 | 108M | 2019 | 324M |
| 1968 | 7.48M | 1994 | 126M | 2020 | 363M |
| 1969 | 7.82M | 1995 | 142M | 2021 | 353M |
| 1970 | 8.31M | 1996 | 141M | 2022 | 461M |
| 1971 | 9.05M | 1997 | 134M | 2023 | 584M |
| 1972 | 11.7M | 1998 | 143M | 2024 | 619M |
| 1973 | 15.4M | 1999 | 141M | 2025 | 855M |
| 1974 | 18.2M | 2000 | 128M | | |
Show data table
| 1950 | 1.3% | 1976 | 1% | 2002 | 0.7% |
| 1951 | 1.6% | 1977 | 1% | 2003 | 0.7% |
| 1952 | 2.4% | 1978 | 1% | 2004 | 0.7% |
| 1953 | 2.9% | 1979 | 1% | 2005 | 0.6% |
| 1954 | 3.3% | 1980 | 1.2% | 2006 | 0.6% |
| 1955 | 3.2% | 1981 | 1.2% | 2007 | 0.6% |
| 1956 | 1.9% | 1982 | 1.2% | 2008 | 0.3% |
| 1957 | 1.9% | 1983 | 1.2% | 2009 | 0.3% |
| 1958 | 1.9% | 1984 | 1.2% | 2010 | 0.3% |
| 1959 | 1.8% | 1985 | 1% | 2011 | 0.3% |
| 1960 | 1% | 1986 | 0.9% | 2012 | 0.3% |
| 1961 | 1.1% | 1987 | 1% | 2013 | 0.3% |
| 1962 | 1.3% | 1988 | 1.1% | 2014 | 0.2% |
| 1963 | 1.2% | 1989 | 0.9% | 2015 | 0.3% |
| 1964 | 1.4% | 1990 | 0.9% | 2016 | 0.3% |
| 1965 | 1.4% | 1991 | 0.9% | 2017 | 0.3% |
| 1966 | 1.3% | 1992 | 0.9% | 2018 | 0.4% |
| 1967 | 1.1% | 1993 | 0.8% | 2019 | 0.5% |
| 1968 | 0.9% | 1994 | 0.8% | 2020 | 0.5% |
| 1969 | 0.8% | 1995 | 0.7% | 2021 | 0.4% |
| 1970 | 0.8% | 1996 | 0.7% | 2022 | 0.6% |
| 1971 | 0.8% | 1997 | 0.7% | 2023 | 0.7% |
| 1972 | 0.8% | 1998 | 0.7% | 2024 | 0.7% |
| 1973 | 0.8% | 1999 | 0.6% | 2025 | 0.9% |
| 1974 | 0.8% | 2000 | 0.6% | | |
| 1975 | 1% | 2001 | 0.7% | | |