| Year | Estimated infections*(95% CI) | Estimated population size§ | Estimated incidence rate** |
---|---|---|---|---|
MSM | 2004 | 466 (267-714) | 55,853 | 834 |
 | 2005 | 488 (335-676) | 56,479 | 864 |
 | 2006 | 506 (292-714) | 56,641 | 893 |
 | 2007 | 352 (229-504) | 58,596 | 601 |
 | 2008 | 408 (238-561) | 59,043 | 691 |
IDU | 2004 | 216 (83-350) | 15,784 | 1,368 |
 | 2005 | 195 (59-400) | 11,752 | 1,659 |
 | 2006 | 158 (64-298) | 12,666 | 1,247 |
 | 2007 | 112 (8-215) | 13,286 | 843 |
 | 2008 | 74 (6-181) | 12,818 | 577 |
NON-ITALIANS | 2004 | 285 (143-420) | 389,920 | 73 |
 | 2005 | 389 (172-553) | 418,823 | 93 |
 | 2006 | 411 (211-683) | 500,007 | 82 |
 | 2007 | 331(144-509) | 480,700 | 69 |
 | 2008 | 292 (128-480) | 450,151 | 65 |