The number of online and email newsletters jumped from 1,053 to 6,055 over the last five years, an increase of 475%.

Meanwhile, print-only newsletters decreased 43% from 7,395 to 4,180, and those in both print and electronic formats remained about the same (4,859 vs. 4,949), according to

The newsletter data reflects listings in the 2009 edition of the Oxbridge Directory of Newsletters 2009, and also reveals that over the last year, online and email newsletters grew from 5,485 to 6,055 while print-only versions dropped from 4,873 to 4,180.