| 年份 | 行政区域面积(平方公里 |
| 2023 | |
| 2022 | |
| 2021 | 点击查看 |
| 2020 | 点击查看 |
| 2019 | 点击查看 |
| 2018 | 点击查看 |
| 2017 | 19253 |
| 2016 | 19253 |
| 2015 | 19253 |
| 2014 | 18814 |
| 2013 | 18814 |
| 2012 | 18814 |
| 2011 | 18814 |
| 2010 | 18814 |
| 2009 | 18832 |
| 2008 | 18832 |
| 2007 | 18832 |
| 2006 | 18832 |
| 2005 | 18832 |
| 2004 | 18903 |
| 2003 | 18903 |
| 2002 | 18903 |
| 2001 | 18903 |
| 2000 | 18903 |
| 1999 | 18903 |
