| Période | Valeur | Variation | | 2001-I | 31.7 | 0 | | 2001-II | 29.8 | -23.97 | | 2001-III | 28.1 | -22.82 | | 2001-IV | 25.8 | -32.74 | | 2002-I | 24.3 | -23.26 | | 2002-II | 24.3 | 0 | | 2002-III | 23.3 | -16.46 | | 2002-IV | 22.2 | -18.88 | | 2003-I | 21.7 | -9.01 | | 2003-II | 20.8 | -16.59 | | 2003-III | 19.5 | -25 | | 2003-IV | 18.3 | -24.62 | | 2004-I | 19.1 | 17.49 | | 2004-II | 19.1 | 0 | | 2004-III | 20.1 | 20.94 | | 2004-IV | 21.9 | 35.82 | | 2005-I | 22.9 | 18.26 |
| | | Période | Valeur | Variation | | 2005-II | 25.5 | 45.41 | | 2005-III | 26.8 | 20.39 | | 2005-IV | 31 | 62.69 | | 2006-I | 31 | 0 | | 2006-II | 33.6 | 33.55 | | 2006-III | 35.8 | 26.19 | | 2006-IV | 34.9 | -10.06 | | 2007-I | 38.2 | 37.82 | | 2007-II | 38.5 | 3.14 | | 2007-III | 37.5 | -10.39 | | 2007-IV | 36.5 | -10.67 | | 2008-I | 35.9 | -6.58 | | 2008-II | 31.1 | -53.48 | | 2008-III | 34.6 | 45.02 | | 2008-IV | 41.1 | 75.14 | | 2009-I | 28.8 | -119.71 | | 2009-II | 46.1 | 240.28 |
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