| 年份 | 自然增长率 |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2022 | |
| 2021 | |
| 2021 | |
| 2020 | |
| 2019 | |
| 2018 | 0.81 |
| 2017 | 1.09 |
| 2016 | 0.85 |
| 2015 | 0.68 |
| 2014 | 0.54 |
| 2013 | 0.74 |
| 2012 | 0.72 |
| 2011 | 0.95 |
| 2010 | 0.71 |
| 2009 | 1.06 |
| 2008 | 1.36 |
| 2007 | 1.33 |
| 2006 | 1.43 |
| 2005 | 1.47 |
| 2004 | 1.17 |
| 2003 | 0.89 |
| 2002 | 0.87 |
| 2001 | 0.91 |
| 2000 | 0.91 |
| 1999 | |
| 1999 |
