Kathryn: They are indeed. And you are just as welcome to the pretty graph I made on this topic, as Mark Steyn was when he raised the issue back in December. There is a link to the graph at the end of that post.

[Oddly (or perhaps not), the negative email I got on that post was directed not at my audacious malevolence in breaking down the numbers by race, but at my ignorance, backwardness, and Microsoft-dhimmitude in having used Excel to make a graph, instead of, like any repsectable writer of pop-math books, some $1,200 graphing package. Hey: Excel comes bundled with the machine, and does lots of good math/stats stuff adequately well. And I don’t have $1,200.]