She's been found and has come home =)
She ran out of our 3rd floor balcony window on 26th August 2014, late at night as we slept. She has never been outside. She may have climbed into another apartment's balcony, or scaled some trees to get down to the ground.
NAME: COCOA, female, a little tubby
AGE: 1 year
BREED: DOMESTIC SHORT HAIRED
COLOR: BROWN/ LIGHT BROWN
FUR: MEDIUM TO LONG, FLUFFY. SHORT, KINKED TAIL
COLLAR: NONE, she doesn't like it
She's been found! Thanks all.