This report also examined indices of exposure between white and black students (these are reproduced as Table 2).  The average white student attended a school that was 86% white in 1968, dropping to 83% in 1990 and 79% in 2000.  At the same time average white exposure to black classmates increased from 4% in 1968 to 9% in 1990, remaining at 9% in 2000.  The average black student attended a school that was 19% white in 1968, increasing to 34% white in 1990, then declining to 29% in 2000.  Decreasing exposure to whites was not due to growing black isolation, however.  The average black student was in a 56% black school in 1990 (a comparable figure is not available for 1968), and this increased by less than half a percentage point in 2000.  Instead, blacks were in schools with a higher Hispanic and Asian presence in 2000.

What evidence, then, has been presented for the thesis of resegregation in the 1990s?