Show data table
| 1968 | 270,900 | 1988 | 4.69M | 2008 | 15.6M |
| 1969 | 336,600 | 1989 | 6.33M | 2009 | 15.3M |
| 1970 | 414,000 | 1990 | 9.18M | 2010 | 14.9M |
| 1971 | 473,954 | 1991 | 10.5M | 2011 | 17.5M |
| 1972 | 543,221 | 1992 | 11.4M | 2012 | 16.7M |
| 1973 | 643,114 | 1993 | 10.8M | 2013 | 23.2M |
| 1974 | 789,047 | 1994 | 11.9M | 2014 | 19.7M |
| 1975 | 1.09M | 1995 | 13.4M | 2015 | 17.1M |
| 1976 | 1.32M | 1996 | 13M | 2016 | 22M |
| 1977 | 1.42M | 1997 | 9.8M | 2017 | 22.7M |
| 1978 | 1.75M | 1998 | 8.46M | 2018 | 23M |
| 1979 | 2.48M | 1999 | 9.04M | 2019 | 21.5M |
| 1980 | 5.54M | 2000 | 9.36M | 2020 | 18.4M |
| 1981 | 5.33M | 2001 | 8.98M | 2021 | 19.7M |
| 1982 | 2.83M | 2002 | 9.5M | 2022 | 17.9M |
| 1983 | 2.93M | 2003 | 10.9M | 2023 | 23.7M |
| 1984 | 2.62M | 2004 | 10.9M | 2024 | 19M |
| 1985 | 2.36M | 2005 | 10.9M | 2025 | 23.8M |
| 1986 | 2.9M | 2006 | 10.8M | | |
| 1987 | 3.65M | 2007 | 11.6M | | |
Show data table
| 1968 | 0.2% | 1988 | 0.2% | 2008 | 0.2% |
| 1969 | 0.2% | 1989 | 0.3% | 2009 | 0.2% |
| 1970 | 0.2% | 1990 | 0.3% | 2010 | 0.1% |
| 1971 | 0.2% | 1991 | 0.4% | 2011 | 0.2% |
| 1972 | 0.2% | 1992 | 0.4% | 2012 | 0.1% |
| 1973 | 0.2% | 1993 | 0.3% | 2013 | 0.2% |
| 1974 | 0.1% | 1994 | 0.3% | 2014 | 0.2% |
| 1975 | 0.2% | 1995 | 0.3% | 2015 | 0.1% |
| 1976 | 0.2% | 1996 | 0.3% | 2016 | 0.2% |
| 1977 | 0.2% | 1997 | 0.2% | 2017 | 0.2% |
| 1978 | 0.2% | 1998 | 0.2% | 2018 | 0.2% |
| 1979 | 0.2% | 1999 | 0.2% | 2019 | 0.1% |
| 1980 | 0.5% | 2000 | 0.2% | 2020 | 0.2% |
| 1981 | 0.5% | 2001 | 0.2% | 2021 | 0.2% |
| 1982 | 0.3% | 2002 | 0.2% | 2022 | 0.1% |
| 1983 | 0.3% | 2003 | 0.2% | 2023 | 0.2% |
| 1984 | 0.3% | 2004 | 0.2% | 2024 | 0.1% |
| 1985 | 0.2% | 2005 | 0.2% | 2025 | 0.1% |
| 1986 | 0.2% | 2006 | 0.2% | | |
| 1987 | 0.2% | 2007 | 0.1% | | |