Check the Polaris official published annual report, it tells you the facts from the horses mouth.

On-road vehicles (including Victory motorcycles) are 4 per cent of their turnover including light emmision vehicles against 7 per cent at their peak in '06 - excluding the light emmision vehicles which didn't exist at the time.

That is a decline of 43 per cent and it get's worse if you take out the light emmision vehicles.

Bedouin. Blessed are those eyes that have seen more roads than any man! (Homer).