A blood drive at work (I didn't participate at this time) offered some trivia about the distribution of blood types, which got me thinking. I gave blood a couple of times back when I lived in California, so I knew my blood type (O) was very common and very much in demand. I was therefore surprised to learn of the high number of type A's in Norway.
While hunting for the US statistics, I learned that the majority of the A's in Norway live in the northern part of the country. So I looked up the statistics for the Sami people, who live primarily north of the arctic circle:
|People/per cent||Type O||Type A||Type B||Type AB|
The distribution for Danes, Swedes and Finns is pretty similar to the Norwegians. The Icelanders, however, show a very clear preference for type O. My own blood type seems to be influenced by my British Isle ancestry.