| 年份 | 自然增长率 |
| 2023 | |
| 2022 | |
| 2021 | |
| 2021 | |
| 2020 | |
| 2020 | |
| 2019 | |
| 2019 | |
| 2018 | 0.60 |
| 2018 | 0.60 |
| 2017 | -0.62 |
| 2017 | -0.62 |
| 2016 | 0.38 |
| 2016 | 0.38 |
| 2015 | 0.63 |
| 2015 | 0.63 |
| 2014 | 0.39 |
| 2014 | 0.39 |
| 2013 | 0.47 |
| 2013 | 0.47 |
| 2012 | 0.49 |
| 2012 | 0.49 |
| 2011 | 0.39 |
| 2011 | 0.39 |
| 2010 | |
| 2010 | |
| 2009 | 1.67 |
| 2009 | 1.67 |
| 2008 | 1.67 |
| 2008 | 1.67 |
| 2007 | 0.30 |
| 2007 | 0.30 |
| 2006 | 0.14 |
| 2006 | 0.14 |
| 2005 | 0.13 |
| 2005 | 0.13 |
| 2004 | -0.07 |
| 2004 | -0.07 |
| 2003 | 0.20 |
| 2003 | 0.20 |
| 2002 | |
| 2002 | |
| 2001 | |
| 2001 | |
| 2000 | |
| 2000 | |
| 1999 |
