Criminal Investigation shows

I was thinking of how many criminal investigation shows there are on TV these days. and even on the 5 networks we get, it's amazing how many there are. I'm not saying there is anything wrong with watching them(I watch very few of them), but do we need so many of them? 
I can't imagine how many people who have cable or satelite get
I might have missed some, but here's a list of what I found on the networks we get here, and all of these are on 4 networks
CBS
48 Hours Mystery
Cold Case
CSI
CSI: Miami
CSI: New York
Without A Trace
NCIS
Criminal Minds
Close To Home
Numb3rs
ABC
Boston Legal
The Evidence
In Justice
NBC
Law & Order
Law & Order: Special Victims Unit
Law & Order: Criminal Intent
Conviction
Crossing Jordan
Heist
FOX
24
Bones
Cops

I can't imagine how many people who have cable or satelite get

I might have missed some, but here's a list of what I found on the networks we get here, and all of these are on 4 networks

CBS
48 Hours Mystery
Cold Case
CSI
CSI: Miami
CSI: New York
Without A Trace
NCIS
Criminal Minds
Close To Home
Numb3rs
ABC
Boston Legal
The Evidence
In Justice
NBC
Law & Order
Law & Order: Special Victims Unit
Law & Order: Criminal Intent
Conviction
Crossing Jordan
Heist
FOX
24
Bones
Cops