We have 14 to date - it would have been 15 but my DS was fooling around with one and shredded it - I ask you !!!!
We haven't sent any yet as each year I write a letter to put in with all of the cards we send to family and friends and to be honest I just haven't had time to even start it.
I think I'm going to cut back in the future since the costs of cards and postage; especially international, make it expensive. Not to mention the waste of paper