| 年份 | 自然增长率 |
|---|---|
| 2025 | — |
| 2024 | — |
| 2023 | — |
| 2022 | — |
| 2021 | — |
| 2020 | — |
| 2019 | 3.15 |
| 2018 | 0.2 |
| 2017 | 0.45 |
| 2016 | 0.34 |
| 2015 | 0.3 |
| 2014 | 0.28 |
| 2013 | 0.26 |
| 2012 | 0.27 |
| 2011 | 0.39 |
| 2010 | 0.39 |
| 2009 | 0.51 |
| 2008 | 1.83 |
| 2007 | 0.45 |
| 2006 | 0.52 |
| 2005 | 0.5 |
| 2004 | 0.56 |
| 2003 | 0.59 |
| 2002 | 0.69 |
| 2001 | 0.77 |
| 2000 | 0.92 |
| 1999 | — |