| 年份 | 自然增长率 |
|---|---|
| 2025 | — |
| 2024 | — |
| 2023 | — |
| 2022 | — |
| 2021 | — |
| 2020 | — |
| 2019 | 8.1 |
| 2018 | 0.71 |
| 2017 | 0.8 |
| 2016 | 0.75 |
| 2015 | 0.62 |
| 2014 | 0.53 |
| 2013 | 0.63 |
| 2012 | 0.59 |
| 2011 | 0.51 |
| 2010 | 0.49 |
| 2009 | 0.65 |
| 2008 | 0.44 |
| 2007 | 0.71 |
| 2006 | 0.7 |
| 2005 | 0.73 |
| 2004 | 0.76 |
| 2003 | 0.08 |
| 2002 | 1.01 |
| 2001 | 1.08 |
| 2000 | 0.94 |
| 1999 | — |