You forgot to post a link to some stats. I'll help you out. How about this one:

http://en.wikipedia.org/wiki/Shrinkage_(accounting)

It says that "per day" and "per year" are both incorrect. Shrinkage figures are given as a percentage of sales. That makes sense because giving shrinkage numbers as a percentage of inventory wouldn't be meaningful without understanding how quickly the inventory was turned over, and even then it's not very useful because it doesn't directly indicate the economic cost of the shrinkage.

What the Wikipedia link says is that shrinkage is about 1.7% of retail sales in the US in 2001. Not per year. Not per day. Also not 2% to 5%.