| 年份 | 长沙 | 株洲 | 湘潭 | 
| 2005 | 0.07074 | 0.04643 | 0.08535 | 
| 2006 | 0.11438 | 0.07963 | 0.11339 | 
| 2007 | 0.17325 | 0.12612 | 0.14198 | 
| 2008 | 0.23628 | 0.20411 | 0.20552 | 
| 2009 | 0.32020 | 0.28356 | 0.28081 | 
| 2010 | 0.39942 | 0.35834 | 0.33875 | 
| 2011 | 0.54263 | 0.50114 | 0.48576 | 
| 2012 | 0.61219 | 0.62087 | 0.61654 | 
| 2013 | 0.69207 | 0.70134 | 0.69717 | 
| 2014 | 0.80209 | 0.79223 | 0.79919 | 
| 2015 | 0.87402 | 0.87982 | 0.88536 | 
| 2016 | 0.93408 | 0.95975 | 0.96521 |