Show data table
| 1981 | 2.08M | 2000 | 7.12M | 2014 | 19.9M |
| 1982 | 2.58M | 2001 | 7.45M | 2015 | 19.7M |
| 1983 | 2.9M | 2002 | 7.83M | 2016 | 21.7M |
| 1984 | 3.26M | 2003 | 8.55M | 2017 | 23.1M |
| 1985 | 3.26M | 2004 | 9.49M | 2018 | 23.3M |
| 1989 | 4.36M | 2005 | 10.7M | 2019 | 24.4M |
| 1990 | 4.77M | 2006 | 12.3M | 2020 | 26M |
| 1991 | 4.73M | 2007 | 13.8M | 2021 | 26.7M |
| 1992 | 5.29M | 2008 | 18.7M | 2022 | 27.8M |
| 1993 | 6.13M | 2009 | 17.3M | 2023 | 32.5M |
| 1994 | 7.9M | 2010 | 15.3M | 2024 | 35.2M |
| 1995 | 8.05M | 2011 | 15.4M | 2025 | 33.3M |
| 1996 | 7.97M | 2012 | 15.2M | | |
| 1997 | 9.39M | 2013 | 17.8M | | |
Show data table
| 1981 | 1.2% | 2000 | 0.7% | 2014 | 0.9% |
| 1982 | 1.4% | 2001 | 0.7% | 2015 | 1% |
| 1983 | 1.5% | 2002 | 0.6% | 2016 | 1% |
| 1984 | 1.5% | 2003 | 0.7% | 2017 | 1.1% |
| 1985 | 1.6% | 2004 | 0.7% | 2018 | 1% |
| 1989 | 1.2% | 2005 | 0.8% | 2019 | 1% |
| 1990 | 1.3% | 2006 | 0.8% | 2020 | 1.4% |
| 1991 | 1.3% | 2007 | 0.8% | 2021 | 1.1% |
| 1992 | 0.8% | 2008 | 1.1% | 2022 | 1% |
| 1993 | 0.9% | 2009 | 1.1% | 2023 | 1% |
| 1994 | 1.1% | 2010 | 0.9% | 2024 | 1.1% |
| 1995 | 1% | 2011 | 0.9% | 2025 | 1% |
| 1996 | 1% | 2012 | 0.8% | | |
| 1997 | 1.1% | 2013 | 0.9% | | |