A bank manager is interested in figuring out how many credit cards are owned by their clients (issued by any bank). They randomly select a sample of 5 customers from their database and ask them how many credit cards they own. The results are found in the following table:

Customer	# Credit Cards
A	3
B	2
C	1
D	3
E	2

Using this data, calculate the standard deviation for number of credit cards owned.

Round your answer to one decimal.