| 年份 | 西南地区常住人口占全国人口比重（%） |
|---|---|
| 2000 | 14.75 |
| 2001 | 14.59 |
| 2002 | 14.54 |
| 2003 | 14.54 |
| 2004 | 14.43 |
| 2005 | 14.45 |
| 2006 | 14.32 |
| 2007 | 14.19 |
| 2008 | 14.11 |
| 2009 | 14.04 |
| 2010 | 13.68 |
| 2011 | 13.65 |
| 2012 | 13.64 |
| 2013 | 13.63 |
| 2014 | 13.62 |
| 2015 | 13.63 |
| 2016 | 13.64 |
| 2017 | 13.67 |
| 2018 | 13.67 |
| 2019 | 13.69 |
| 2020 | 13.72 |
| 2021 | 13.69 |
| 2022 | 14.01 |
| 2023 | 14.01 |
| 2024 | 14.02 |