That is correct. The global sales figure for the PCE including Duos was, I think, 5.8 million. We know that 750k TG-16s were manufactured for the North American market, so we can say that about 5 million systems existed in Japan. That 1.92 million figure for the Duo/CD system is also correct.
About the PC-FX: An interview from about 2001 with an NEC representative said the total sales were about 110,000. I suspect that for some of those numbers, we're actually seeing the number of systems shipped to retail outlets rather than sold through to homes.