Democrats Growing On Trees?

There is an interesting article posted this week on Blue Hampshire discussing growth in Democrat voter registrants.  They discuss the double digit registration leaps in several NH counties between 2002 and 2008.  Now this of course only accounts for the time under Bush when let's face it, he turned a lot of people off from wanting what the Republican party was selling, mostly because he did not represent what it means to be a Republican, but I digress.  They do not get into what has happened with registrations since Obama took office.  But we'll ignore that for this discussion and move on.

In Rockingham county they site that Republicans grew 17% but Democratic registration in that same period grew by 65%.

In Merrimack County Republican registration increased 9% but Democratic registration lept by 74%.

Their article (found in full HERE) goes on to list a few other NH counties that saw the same type of double digit registration growth from Democrats.

My first question is where did all these people come from?  Merrimack County for instance only increased it's population by 8.71 percent from 2000 until 2009.  And that increase includes many underage children who are not yet eligible to vote.  Rockingham County increased by just 6.82% during this same time.

While I don't doubt that Democrats gained more voters due to Bush from 2000 to 2008 I have to question the size of the leaps, could we be seeing evidence of voter fraud as we've seen time and time again in NH?