A recent study published in May 2011 indicates a 20% increase from 2004 to 2008. http://articles.latimes.com/2011/may/20/news/la-heb-home-births-increase-20110520
A great website to check out for questions about maternity practices is http://www.childbirthconnection.com/.
Now, I know home births aren't for everyone. In fact many people I tell that we're planning a home birth for our next child think we're down right crazy! The rise in home births shows that I'm not alone. The statistics show that we're not completely insane. What drives our decision is the lack of options available to us in the hospital setting. We had our daughter in a birth center in London and were able to have an amazing water birth. Whatever you decide, hospital, birth center, home birth, midwife or OB make sure its what makes you comfortable. There is nothing worse than a laboring mother in unecessary stress impeding the birth process leading to unwanted procedures and complications. The upmost importantce is healthy moms and babies!