| Year | Total population/million | Old people aged above 65 years old/million |
| 2005 | 1307.56 | 100.55 |
| 2006 | 1314.48 | 104.19 |
| 2007 | 1321.29 | 106.36 |
| 2008 | 1328.02 | 109.56 |
| 2009 | 1334.5 | 113.07 |
| 2010 | 1340.91 | 118.94 |
| 2011 | 1347.35 | 122.88 |
| 2012 | 1354.04 | 127.14 |
| 2013 | 1360.72 | 131.61 |
| 2014 | 1367.82 | 137.55 |
| 2015 | 1374.62 | 144.34 |
