Family-Sponsored	All Chargeability Areas Except Those Listed	CHINA-mainland born	INDIA	MEXICO	PHILIPPINES
F1	01AUG07	01AUG07	01AUG07	01NOV94	01FEB05
F2A	01AUG13	01AUG13	01AUG13	08JUL13	01AUG13
F2B	22AUG08	22AUG08	22AUG08	01FEB95	01APR04
F3	08FEB04	08FEB04	08FEB04	01APR94	08AUG93
F4	15JUN02	15JUN02	15JUN02	08JUL97	22SEP91

above is visa bulletin april 2015.



ark bro is 100% right 

F4 is siblings category, right now i.e april 2015, they are working on 15june 2002 case, 
so wait time is 13 years for people of 2002....


BEST OF LUCK