| Solid waste (ton) | Population | Year |
| 12,410 | 317,398 | 2004 |
| 35,405 | 321,206 | 2005 |
| 46,500 | 325,061 | 2006 |
| 58,206 | 336,024 | 2007 |
| 61,168 | 347,897 | 2008 |
| 67,151 | 359,111 | 2009 |
| 75,923 | 363,420 | 2010 |
| 81,205 | 367,781 | 2011 |
| 85,499 | 372,194 | 2012 |
| 89,794 | 376,660 | 2013 |
| 94,089 | 381,180 | 2014 |
| 98,384 | 385,754 | 2015 |
| 102,679 | 390,383 | 2016 |
| 106,974 | 395,068 | 2017 |