That info is in the print issue of Bicycle Retailer and Industry News (BRAIN) Dec. 1 issue starting on front page "Third Quarter Sales Reflect Weak Growth" and continues on page 23 with a graph on slowest growth categories this year.
US tandem builders *may* be an exception, but *overall* tandem sales in US were down 24% according to the BPSA figures.
Pedal on TWOgether!
Rudy and Kay/zonatandem