| Year | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 |
| CPI (last year = 100) | 105.9 | 99.3 | 103.3 | 105.4 | 102.6 | 102.6 | 102 | 101.2 |
| CPI (1978 = 100) | 522.7 | 519 | 536.1 | 565 | 579.7 | 594.8 | 606.7 | 615.2 |