| 年份 | 自然增长率 |
|---|---|
| 2025 | — |
| 2024 | — |
| 2023 | — |
| 2022 | — |
| 2021 | — |
| 2020 | — |
| 2019 | — |
| 2018 | 0.38 |
| 2017 | 0.57 |
| 2016 | 0.5 |
| 2015 | 0.49 |
| 2014 | 0.49 |
| 2013 | 0.57 |
| 2012 | 0.56 |
| 2011 | 0.47 |
| 2010 | 0.64 |
| 2009 | 0.75 |
| 2008 | 0.39 |
| 2007 | 0.18 |
| 2006 | 0.21 |
| 2005 | 0.22 |
| 2004 | 0.21 |
| 2003 | 0.22 |
| 2002 | 0.25 |
| 2001 | 0.27 |
| 2000 | 0.27 |
| 1999 | — |