Show data table
| 1971 | 29.1M | 1990 | 1.45B | 2009 | 3.37B |
| 1972 | 54.5M | 1991 | 1.25B | 2010 | 3.67B |
| 1973 | 89.8M | 1992 | 1.52B | 2011 | 5B |
| 1974 | 256M | 1993 | 1.44B | 2012 | 9.25B |
| 1975 | 523M | 1994 | 1.52B | 2013 | 8.77B |
| 1976 | 589M | 1995 | 1.51B | 2014 | 8.21B |
| 1977 | 515M | 1996 | 1.44B | 2015 | 7.53B |
| 1978 | 574M | 1997 | 1.48B | 2016 | 7.94B |
| 1979 | 584M | 1998 | 1.32B | 2017 | 6.8B |
| 1980 | 884M | 1999 | 1.34B | 2018 | 7.57B |
| 1981 | 1.13B | 2000 | 1.58B | 2019 | 6.55B |
| 1982 | 1.26B | 2001 | 1.82B | 2020 | 6.1B |
| 1983 | 1.46B | 2002 | 1.87B | 2021 | 5.78B |
| 1984 | 1.58B | 2003 | 1.97B | 2022 | 5.78B |
| 1985 | 1.62B | 2004 | 2.23B | 2023 | 5.85B |
| 1986 | 1.31B | 2005 | 2.74B | 2024 | 5.99B |
| 1987 | 1.14B | 2006 | 3.02B | 2025 | 5.99B |
| 1988 | 1.15B | 2007 | 3.24B | | |
| 1989 | 1.17B | 2008 | 3.46B | | |
Show data table
| 1971 | 9.7% | 1990 | 12.4% | 2009 | 6.1% |
| 1972 | 14.9% | 1991 | 11.1% | 2010 | 5.6% |
| 1973 | 18.6% | 1992 | 12.2% | 2011 | 6.5% |
| 1974 | 15.5% | 1993 | 11.5% | 2012 | 10.6% |
| 1975 | 25% | 1994 | 11.8% | 2013 | 9.7% |
| 1976 | 23% | 1995 | 11% | 2014 | 8.9% |
| 1977 | 18.8% | 1996 | 9.4% | 2015 | 9.6% |
| 1978 | 20.9% | 1997 | 9.4% | 2016 | 10.6% |
| 1979 | 15.6% | 1998 | 8.2% | 2017 | 8.4% |
| 1980 | 14.9% | 1999 | 7.5% | 2018 | 8.3% |
| 1981 | 15.7% | 2000 | 7.1% | 2019 | 7.4% |
| 1982 | 16.7% | 2001 | 8.2% | 2020 | 8% |
| 1983 | 17.2% | 2002 | 8.1% | 2021 | 6.6% |
| 1984 | 16.9% | 2003 | 8% | 2022 | 5.3% |
| 1985 | 15.6% | 2004 | 7.9% | 2023 | 5.5% |
| 1986 | 15.9% | 2005 | 7.7% | 2024 | 5.6% |
| 1987 | 13.2% | 2006 | 7.1% | 2025 | 5.7% |
| 1988 | 13.7% | 2007 | 6.7% | | |
| 1989 | 12.5% | 2008 | 5% | | |