The firm's list shows the percentage share of each of the little nasties, and we don't know about anyone else but we're still getting people's documents sent to us courtesy of the horrid Sircam worm.
Here's Kaspersky's list:
I-Worm.BadtransII 87.4
Trojan.PSW.Gip 2.5
I-Worm.Hybris 2.3
I-Worm.Sircam 1.4
I-Worm.Magistr 1.1
I-Worm.Aliz 0.9
I-Worm.Nimda 0.6
Trojan.PSW.Hooker 0.5
I-Worm.Goner 0.3
Macro.Word97.Thus 0.3
I-Worm.Petik 0.2
I-Worm.Zoher 0.1
Backdoor.Death 0.1
Macro.Word97.Furi 0.1
JS.Trojan.Seeker 0.1
Macro.Word97.Jota 0.1
I-Worm.HappyTime 0.1
Gnutella-Worm.Mandragore 0.1
Macro.Word97.Verlor 0.1
Macro.Word97.Shore 0.1 µ