I'm not basing this on any kind of scientific reasoning, but I'd say something around 17/9/5.
Tropical Storm
Hurricane
Major Hurricane
===============
Alberto
Beryl
Chris
Debby
Ernesto
Florence
Gordon
Helene
Isaac
Joyce
Kirk
Leslie
Michael
Nadine
Oscar
Patty
Rafael
Florence and Isaac will reach Cat 4 intensity, but no Cat 5s in 2006. Isaac and Oscar will be retired.

Landfalls: Alberto (Mexico), Beryl (North Carolina), Debby (Lesser Antilles/Canadian maritimes), Ernesto (NW Florida), Helene (Lesser Antilles, Yucatan/Belize), Isaac (South Texas), Leslie (Bahamas), Michael (Hispaniola, Bahamas, South Carolina), Oscar (west coast of Florida), Patty (Cuba/Bahamas)
LOL, I got a little carried away. I'm sure I won't be anything close to the actual season, but making up tracks like these is fun for me.