Oh, I do believe you but I've never seen those statistics in print. Can you remember a source so I can read up on these interesting figures?
Here's some sources. David Bower's Article on Counterfeit 1916-D Merc's. He stated that many of the coin shows he attended in the past, "...more than half of the 16-D's I seen on show floors were counterfeit." The most frequently seen counterfeit or altered U.S. coins, according to PCGS's 1997 book Coin Grading and Counterfeit Detection, include: 1856 Flying Eagle cent 1909-S VDB Lincoln cent 1955 double-die Lincoln cent 1916-D Mercury dime Cincinnati commemorative half dollar 1804 Bust dollar (a million dollar rarity) 1893-S Morgan dollar Saint-Gaudens high-relief double eagle January 25, 2000. PCGS newsletter in reference to the 1916-D Mercury Dime: "Counterfeit Detection Alert: 264,000 Minted . . . 500,000 Known to Exist!" From "Found Treasures: Counterfeits" By Stewart Huckaby "One proof against counterfeits is to buy coins that have been graded and slabbed by a reputable grading service. Part of the grading process consists of authentication, and even in the case when a coin, such as an AG-3 1916-D Mercury dime, might be easy to grade, the mere fact that the coin is authenticated is enough reason to justify the slabbing fee." ********************************************************** Your 1916-D may be the real deal. But if I were to buy it, I would NEVER buy this coin raw unless I had your first born's blood guaranteeing its authenticity. It is the way of the world...there are more counterfeits than real 1916-D Merc's floating about. "A fool and his money are soon departed"