I'd guess the best open data set is amazon.com's knife sections sorted by "bestselling"--at least for bestselling in the U.S.
Just for fun, the top three from each are:
Sports & Outdoors Hunting & Fishing Hunting Hunting Knives
1. Smith & Wesson CK5TBS Bullseye Extreme Ops 4.1" 40% Serrated Black Tanto Blade
2. Set 3 Ninja Stealth Black Throwing Knives with nylon case
3. Spyderco Tenacious G-10 Handle Folding Plain Edge Knife
Tools & Home Improvement Power & Hand Tools Hand Tools Knives Folded Knives
1. Smith & Wesson SWMP5LS M&P Linerlock Knife with 2nd Generation MAGIC Assisted Open and 40% Serrated Drop Point Blade
2. Gerber 06079 Folding Clip Point Serrated Gator Knife, Box
3. Gerber 30-000176 Epic Knife, Serrated Edge
Sports & Outdoors Outdoor Recreation Camping & Hiking Knives & Tools Folding Knives
1. Victorinox Swiss Army Ranger with Classic Pocket Knife
2. Victorinox Swiss Army Tinker and Classic Knife Combo
3. Victorinox Swiss Army Champion Plus Pocket Knife
It seems like S&W, Gerber, and Victorinox are in the running. If I had to guess, I'd say Victorinox because they dominate the whole first page of "bestselling" in that last section.
S&W and Gerber (and the Spyderco Tenacious) are China-produced.