Show data table
| 1951 | 2.31M | 1974 | 16.9M | 2004 | 60.6M |
| 1952 | 2.28M | 1975 | 21.4M | 2005 | 62.6M |
| 1953 | 2.6M | 1976 | 23.7M | 2006 | 75.6M |
| 1954 | 2.55M | 1977 | 31.8M | 2007 | 95.9M |
| 1955 | 3.02M | 1978 | 43.1M | 2008 | 132M |
| 1956 | 3.23M | 1979 | 49.5M | 2009 | 157M |
| 1957 | 4.9M | 1980 | 57M | 2010 | 170M |
| 1958 | 5.45M | 1981 | 60.5M | 2011 | 200M |
| 1959 | 4.98M | 1982 | 67M | 2012 | 210M |
| 1960 | 3.92M | 1983 | 70M | 2013 | 254M |
| 1961 | 3.83M | 1984 | 81M | 2014 | 242M |
| 1962 | 3.83M | 1985 | 94M | 2015 | 288M |
| 1963 | 3.82M | 1986 | 106M | 2016 | 334M |
| 1964 | 5.85M | 1987 | 122M | 2017 | 368M |
| 1965 | 6.25M | 1988 | 132M | 2018 | 358M |
| 1966 | 6.5M | 1989 | 138M | 2019 | 393M |
| 1967 | 6.8M | 1990 | 67.1M | 2020 | 343M |
| 1968 | 7.05M | 1991 | 47.4M | 2021 | 422M |
| 1969 | 7.2M | 1993 | 40.6M | 2022 | 461M |
| 1970 | 9.9M | 2000 | 52.5M | 2023 | 524M |
| 1971 | 11.4M | 2001 | 63M | 2024 | 547M |
| 1972 | 15.4M | 2002 | 63.6M | 2025 | 580M |
| 1973 | 15.9M | 2003 | 82.2M | | |
Show data table
| 1951 | 1% | 1974 | 1.6% | 2004 | 0.7% |
| 1952 | 0.9% | 1975 | 1.9% | 2005 | 0.6% |
| 1953 | 1% | 1976 | 1.8% | 2006 | 0.7% |
| 1954 | 1% | 1977 | 1.9% | 2007 | 0.8% |
| 1955 | 1.1% | 1978 | 2.3% | 2008 | 1% |
| 1956 | 1.1% | 1979 | 2.2% | 2009 | 1.1% |
| 1957 | 1.6% | 1980 | 2.2% | 2010 | 1.1% |
| 1958 | 1.7% | 1981 | 2.1% | 2011 | 1.1% |
| 1959 | 1.5% | 1982 | 2.3% | 2012 | 1.1% |
| 1960 | 1.2% | 1983 | 2.3% | 2013 | 1.4% |
| 1961 | 1.1% | 1984 | 2.4% | 2014 | 1.2% |
| 1962 | 1% | 1985 | 2.6% | 2015 | 1.4% |
| 1963 | 0.9% | 1986 | 2.8% | 2016 | 1.5% |
| 1964 | 1.3% | 1987 | 3% | 2017 | 1.6% |
| 1965 | 1.2% | 1988 | 2.9% | 2018 | 1.5% |
| 1966 | 1.2% | 1989 | 2.7% | 2019 | 1.6% |
| 1967 | 1.1% | 1990 | 2.2% | 2020 | 1.5% |
| 1968 | 1.1% | 1991 | 1.5% | 2021 | 1.5% |
| 1969 | 1.1% | 1993 | 1.2% | 2022 | 1.5% |
| 1970 | 1.4% | 2000 | 0.7% | 2023 | 1.5% |
| 1971 | 1.5% | 2001 | 0.8% | 2024 | 1.5% |
| 1972 | 1.8% | 2002 | 0.8% | 2025 | 1.5% |
| 1973 | 1.7% | 2003 | 1% | | |