| Anno | Italia | Media Ocse | Germania | Francia |
|---|---|---|---|---|
| 2000 | 487 | 500 | 484 | 505 |
| 2003 | 476 | 497 | 491 | 496 |
| 2006 | 469 | 495 | 495 | 488 |
| 2009 | 486 | 499 | 497 | 496 |
| 2012 | 490 | 501 | 508 | 505 |
| 2015 | 485 | 497 | 509 | 499 |
| 2018 | 476 | 493 | 498 | 493 |
| Anno | Italia | Media Ocse | Germania | Francia |
|---|---|---|---|---|
| 2000 | 487 | 500 | 484 | 505 |
| 2003 | 476 | 497 | 491 | 496 |
| 2006 | 469 | 495 | 495 | 488 |
| 2009 | 486 | 499 | 497 | 496 |
| 2012 | 490 | 501 | 508 | 505 |
| 2015 | 485 | 497 | 509 | 499 |
| 2018 | 476 | 493 | 498 | 493 |