| 年份 | 行政区域面积(平方公里 |
| 2023 | |
| 2022 | |
| 2021 | |
| 2020 | 点击查看 |
| 2019 | 点击查看 |
| 2018 | 点击查看 |
| 2017 | 22000 |
| 2016 | 22000 |
| 2015 | 22000 |
| 2014 | 22000 |
| 2013 | 22000 |
| 2012 | 22000 |
| 2011 | 22000 |
| 2010 | 19200 |
| 2009 | 19200 |
| 2008 | 19200 |
| 2007 | 19200 |
| 2006 | 19200 |
| 2005 | 19200 |
| 2004 | 19040 |
| 2003 | 19200 |
| 2002 | 19200 |
| 2001 | 19040 |
| 2000 | 19040 |
| 1999 | 19040 |
