Dave,
Here are the actual registrations from the OEMs in the "Competition Off Highway" segment:
2011 2010
Total 40,308 45,195
Hon 8,391 10,802
Kaw 9,526 8,913
KTM 12,643 10,788
Suz 1,873 2,822
Yam 7,392 11,558
KTM sells 31.4% of the total offroad motorcycles sold. Back in 2005, they were still behind Honda and Yamaha with 18 or 19%. I think they finally passed Honda last year. KTM has done one hell of a job here in the US and having a full line of 2T models has been a big part of that success.
Keep in mind this category does not include Honda's 50s, 80s, 100s, Kawasaki's 110s, etc but it does include KTM's 50s, 65s, etc because they are race bikes.
Sorry the columns aren't separated. They were in my original text but not when I submit it.