If you want to know classes played numbers which have increased lately to over 1400 online this is a June 2013 PiE Chart.
http://wiki.project1999.com/Project1999:About
SK>----11%
DRU/WAR>----10%
SHM>MNK>----8%
CLR/BRD/ENC/MAG>----7%
NEC/ROG >----6%
WIZ >----5%
PAL/RNG >---- 4%