Actual altruism:
Understanding another person's feelings and needs and selflessly helping them.

How many act when they believe the are being altruistic:
- Giving to someone what the giver believes is good for the receiver without bothering to learn about the receiver to see if this is actually what they want or need.  It is done so the giver feels good about themselves.  Frequently what is given is given by force of government and doesn't actually cost the "giver" anything. 

 I think that is a very good point we tend to give what is easy to give its so much harder learning what to give