Does Anyone Know Schedule for when sitcoms come and go?

Here is a list of what is on Now:
Full House
Fresh Prince of Bel-Air
The Cosby Show
Roseanne
Who's The Boss
Murphy Brown
Wings

Here is a list of what is coming (so far):
Mad About You
Home Improvement
The Nanny

I just wanna know when these or other shows are coming or going?

I know i posted this earlier tonight but 18 people have viewed this so im guessing kno one knows...

all i know so far is this...

Mad About You- March 2006
Home Improvement- 2007
The Nanny- 2009