This was 30yrs ago...I think "not much" has changed except in Nakuru, Kajiado, Nairobi,Kiambu, Machakos and maybe Mombasa..demographically speaking...although tribal clashes of 92 did see some small re-alignments in some counties.
Big changes for example - keiyo in 92 - biwott - expelled nearly all kikuyus - in 1992 clashes - same with Nandi - etc etc
Kalenjin entered Nakuru in big number in 1990s - to occupy Mau forest excision - about 200,000 acres - were excised until 2001 - and population of kalenjin swelled to nearly 40 percent now.