There is a noise coming from the steering column every time I turn the wheel?

1995 Pontiac Grand Prix Mileage: 40,000. Just recently, I started noticing a noise emanating from the steering column every time I turn the wheel. It sounds as if it is coming from the area where the steering wheel connects to the steering column. The noise reminds me of a clicking egg timer, only the frequency of the "clicks" is determined by how quickly or slowly the wheel is turned. Also, the noise remains constant regardless of the temperature or how long the car has been driven. I am hoping you may have an idea as to what may be the cause of this problem and how I can go about taking care of it. Thanks for your time and your advice.