| 年份 | 行政区域面积(平方公里 |
| 2025 | |
| 2024 | |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | |
| 2019 | 2128 |
| 2018 | 2128 |
| 2017 | 2128 |
| 2016 | 2229 |
| 2015 | 2229 |
| 2014 | 2230 |
| 2013 | 1830 |
| 2012 | 1873 |
| 2011 | 1873 |
| 2010 | 1873 |
| 2009 | 1873 |
| 2008 | 1873 |
| 2007 | 1873 |
| 2006 | 1873 |
| 2005 | 1873 |
| 2004 | 1805 |
| 2003 | 1873 |
| 2002 | 1840 |
| 2001 | 1838 |
| 2000 | 2220 |
| 1999 | 2220 |
