GENDER_RATIO_MALE_ONLY = 0
GENDER_RATIO_FEMALE_12_5 = 31
GENDER_RATIO_FEMALE_25 = 63
GENDER_RATIO_FEMALE_50 = 127
GENDER_RATIO_FEMALE_75 = 191
GENDER_RATIO_FEMALE_87_5 = 223
GENDER_RATIO_FEMALE_ONLY = 254
GENDER_RATIO_NO_GENDER = 255
