Every second your body creates and kills as many as "how many" red blood cells?

"An average" body may create and kill 15 million red blood cells every second!

I doubt that I've had that many red cells at any time in a year !!

Good answer SR. Source

I'm wondering about that answer...
According to my anatomy books the number is on average about 2 million cells per second. I found an adobe file from a medical book on the Cardiovascular system that states:

Without DNA, RNA or organelles, RBCs can not make cellular repairs, grow or divide as other cells do. The total volume of red blood cells in the body is replaced about every 120 days. RBCs are short lived and are replaced at a rate of about 2 million cells per second

Cardiovascular System html version of the file.