I, too, have an A+ blood type. Yes, it's the second most common, next to blood type O.
Here in our country, not all people get to know their blood type. Some even die without really knowing it. Unless one had a tragic accident or some disease that would require blood transfusion, he/she isn't compelled to do so. Most companies don't require it in medical examination nor in school applications. I wonder if this is also the case in other countries.
The other way to know one's blood type here is of course, though donation. I have long been wanting to donate but for weight reasons, I am not qualified to do so. I have been postponing my plans of getting a tattoo, because I want to make better use of my blood before finally getting inked.