Homeschooling and Charter Schools Growth

I haven't read any new statistics in the last year which dealt with how homeschooling is growing. Is it?  I'm aware that the statistics are that charter schools are growing fast and that virtual schools are growing faster.  But I don't have much insight into whether homeschooling is growing.

I did read on a homeschool online blog post called Education in America is Changing   that:

The government says that 1.5 million students were homeschooled in 2007. …The government homeschool statistics shows a 36% relative increase since the last estimate in 2003 when research reported 2.2% or 1.1 million students (1,096,000) homeschooled students.
But the world was simpler and less nuanced than it is today.  I think there are all sorts of hybrids and the statistics are yet harder to track.
The charter school movement is shooting along.  In 2010, there were 1.7M charter school students which meant that in 2007-2010, the number of charter school students grew and exceeded the number of homeschooling students (I’m assuming that homeschooling is growing at a 10% rate these days which is my hypothesis).