| 08-2010 | 571.86 | 580.25 | |
| 07-2010 | 534.91 | 543.39 | |
| 06-2010 | 540.09 | 548.96 | |
| 05-2010 | 552.77 | 561.40 | |
| 04-2010 | 584.94 | 593.02 | |
| 03-2010 | 557.02 | 565.00 | |
| 02-2010 | 507.56 | 515.47 | |
| 01-2010 | 524.08 | 531.67 | |
| 12-2009 | 484.10 | 491.51 | |
| 11-2009 | 453.80 | 461.06 | |
| 10-2009 | 430.51 | 437.82 | |
| 09-2009 | 432.06 | 439.49 | |
| 08-2009 | 438.92 | 446.51 | |
| 07-2009 | 376.65 | 384.33 | |
| 06-2009 | 364.25 | 371.97 | |
| 05-2009 | 341.81 | 349.75 | |
| 04-2009 | 340.93 | 349.13 | |
| 03-2009 | 294.12 | 302.43 | |
| 02-2009 | 266.01 | 274.48 | |
| 01-2009 | 249.55 | 257.72 | |
| 12-2008 | 238.55 | 246.61 | |
| 11-2008 | 301.37 | 309.87 | |
| 10-2008 | 377.97 | 386.11 | |
| 09-2008 | 495.89 | 503.43 | |
| 08-2008 | 518.33 | 525.56 | |
| 07-2008 | 541.61 | 548.46 | |
| 06-2008 | 539.58 | 546.54 | |
| 05-2008 | 547.56 | 554.52 | |
| 04-2008 | 559.48 | 566.35 | |
| 03-2008 | 551.75 | 558.71 | |
| 02-2008 | 543.73 | 551.07 | |
| 01-2008 | 488.70 | 496.05 | |
| 12-2007 | 461.62 | 469.04 | |
| 11-2007 | 484.57 | 491.95 | |
| 10-2007 | 573.13 | 580.74 | |
| 09-2007 | 560.60 | 568.39 | |
| 08-2007 | 562.13 | 570.08 | |
| 07-2007 | 591.94 | 599.84 | |
| 06-2007 | 567.92 | 575.99 | |
| 05-2007 | 579.12 | 587.13 | |
| 04-2007 | 585.08 | 593.09 | |
| 03-2007 | 497.81 | 505.99 | |
| 02-2007 | 444.85 | 453.14 | |
| 01-2007 | 446.77 | 455.10 | |
| 12-2006 | 514.27 | 521.85 | |
| 11-2006 | 555.22 | 563.00 | |
| 10-2006 | 604.53 | 612.48 | |
| 09-2006 | 606.71 | 614.58 | |
| 08-2006 | 610.25 | 618.08 | |
| 07-2006 | 617.80 | 625.71 | |
| 06-2006 | 578.03 | 585.95 | |
| 05-2006 | 639.40 | 647.25 | |
| 04-2006 | 530.20 | 538.37 | |
| 03-2006 | 434.39 | 442.73 | |
| 02-2006 | 427.08 | 435.47 | |
| 01-2006 | 400.30 | 408.57 | |
| 12-2005 | 396.61 | 404.22 | |
| 11-2005 | 373.02 | 380.67 | |
| 10-2005 | 348.22 | 355.72 | |
| 09-2005 | 325.09 | 332.45 |