| 年份 | 西部地区常住人口占全国人口比重（%） |
|---|---|
| 2000 | 27.36 |
| 2001 | 27.23 |
| 2002 | 27.17 |
| 2003 | 27.16 |
| 2004 | 27.04 |
| 2005 | 26.92 |
| 2006 | 26.79 |
| 2007 | 26.64 |
| 2008 | 26.55 |
| 2009 | 26.47 |
| 2010 | 25.76 |
| 2011 | 25.69 |
| 2012 | 25.68 |
| 2013 | 25.63 |
| 2014 | 25.63 |
| 2015 | 25.65 |
| 2016 | 25.65 |
| 2017 | 25.72 |
| 2018 | 25.73 |
| 2019 | 25.76 |
| 2020 | 25.74 |
| 2021 | 25.71 |
| 2022 | 26.33 |
| 2023 | 26.32 |
| 2024 | 26.33 |