Sex	Social class	Average number	Total
BOTH SEXES	Total	Average	77.89
BOTH SEXES	Total	Standard deviation	18.57
BOTH SEXES	I	Average	81.60
BOTH SEXES	I	Standard deviation	14.95
BOTH SEXES	II	Average	79.80
BOTH SEXES	II	Standard deviation	16.95
BOTH SEXES	III	Average	79.00
BOTH SEXES	III	Standard deviation	17.73
BOTH SEXES	IV	Average	78.02
BOTH SEXES	IV	Standard deviation	18.04
BOTH SEXES	V	Average	76.86
BOTH SEXES	V	Standard deviation	19.31
BOTH SEXES	VI	Average	75.83
BOTH SEXES	VI	Standard deviation	20.38
BOTH SEXES	No data recorded	Average	73.47
BOTH SEXES	No data recorded	Standard deviation	21.02
MALES	Total	Average	79.76
MALES	Total	Standard deviation	17.12
MALES	I	Average	81.97
MALES	I	Standard deviation	14.02
MALES	II	Average	81.63
MALES	II	Standard deviation	15.68
MALES	III	Average	80.10
MALES	III	Standard deviation	16.67
MALES	IV	Average	79.74
MALES	IV	Standard deviation	16.56
MALES	V	Average	78.75
MALES	V	Standard deviation	17.96
MALES	VI	Average	78.96
MALES	VI	Standard deviation	18.89
MALES	No data recorded	Average	79.62
MALES	No data recorded	Standard deviation	18.44
FEMALES	Total	Average	76.11
FEMALES	Total	Standard deviation	19.69
FEMALES	I	Average	81.18
FEMALES	I	Standard deviation	15.93
FEMALES	II	Average	78.17
FEMALES	II	Standard deviation	17.85
FEMALES	III	Average	78.05
FEMALES	III	Standard deviation	18.54
FEMALES	IV	Average	75.94
FEMALES	IV	Standard deviation	19.49
FEMALES	V	Average	74.93
FEMALES	V	Standard deviation	20.42
FEMALES	VI	Average	73.41
FEMALES	VI	Standard deviation	21.14
FEMALES	No data recorded	Average	70.88
FEMALES	No data recorded	Standard deviation	21.49