How many books are on your e-reader?

I started using a Kindle in March 2012, and as of today I have 67 books on it from various genres. How many books are on yours? I love using an e-reader because I think it's easier on the eyes and the hands (my hands sometimes get sore holding a book open because I'm getting a touch of arthritis). It also saves precious space. I was getting overrun with books at my house. Before the Kindle, all of the books I bought went into boxes that I kept in a shed. Now all of my new purchases are being digitally stored. Seriously, what took me so long to start using an e-reader???