Year-over-year Canadian motorhome registrations plummeted 34.1% in June and 25.7% for the first six months, according to the latest report from Statistical Surveys Inc. Forest River Inc. was the Canadian motorhome sales leader year-to-date, capturing a 25.4% market share, with Thor Industries Inc. holding a 23.2% share and Winnebago Industries Inc. 22.8%. Class A registrations declined 16.3% in June and 13.6% year-to-date.