Something's wrong with those numbers. TNG didn't have an eighth season.Fall 1987 - Spring 1988: 8.55 Million
Fall 1988 - Spring 1989: 9.14 Million
Fall 1989 - Spring 1990: 9.77 Million
Fall 1990 - Spring 1991: 10.58 Million
Fall 1991 - Spring 1992: 11.50 Million
Fall 1992 - Spring 1993: 10.83 Million
Fall 1993 - Spring 1994: 9.78 Million
Fall 1994 - Spring 1995: 7.05 Million
These numbers come from this site I think.
Rob
As many have already pointed out, there was no TNG ratings slide. The ratings were steady throughout its run. Even TNG reruns scored ratings almost as high as the initial broadcasts.
Trust me, folks. I was there, and I payed attantion to the numbers. Just after TNG went off the air, DS9 experienced a steady ratings drop that continued through Voyager and ENT.