A few years ago I got 'The Encyclopedia of the Harley-Davidson' by Peter Henshaw and Ian Kerr as a gift. It lists the production numbers of each model by year. It only goes up to 2001. You can try to find it or maybe an updated version.
Thats top secret, Harley would never release that information
The best I can do is U.S Motorcycle Sales in 2008
scooter sales--- up 41.5%
dual purpose--- up 22.8%
cruiser bikes--- down 5.6%
off road--- down 30%
