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 number of customers from their database and ask them how many credit cards they own. The results are found in the following table:

# Credit Cards	f
4	0
3	2
2	4
1	1
0	2

Using this data, calculate the mean number of credit cards owned. Use up to two decimals with your answer.