According to the book Cougars by the Numbers, 3914 standards and 1156 XR-7s. That is also further broken down by interior trim codes... I defer posting more info because it was in a copyrighted book...
Oh, I agree there is worse colors out there then that. To me it just don't look good on a cougar or a mustang. Maybe a 55-57 T-bird, or 64ish Galaxie. Mark I have a pic of my G when it was that color in My Pic's on here if you want to check it out.( I don't feel like putting on one of my wifes dresses to dig it up, if you know what I mean Hahahaha)
My '68 std was this color for many years, and it has dark red interior still, and there were very few in that combination. I had her painted Black Cherry many years ago. It's not as forgiving a color, but I like it.
You can see some photos of mine which I posted three weeks ago the the Garage section of this site. According to my Marti Report, there were 1,158 with this paint code, 210 with that paint and black leather. This car was built on 3/28/68, released on 8/22/68, but not sold 'till 2/25/69! Maybe the color had something to do with it sitting in the lot for so long! There are much better colors, black cherry, etc., but the color isn't that bad if the paint is shiny and in good shape and I get a lot of complements, plus chicks seem to dig it. Yeah, maybe it is indeed a girlie color! BTW, M2 Models has a 1/64 diecast toy of a '68 XR-7G 390 available now at Walmart or Toys-R-Us in supposed diamond blue. It's a bit darker than the real color, but has the black vinyl top with the closed sunroof.