SEX;SOCIAL CLASS;INDICATOR;Total BOTH SEXES;Total;Mean;17.73 BOTH SEXES;Total;Standard deviation;4.99 BOTH SEXES;I;Mean;18.00 BOTH SEXES;I;Standard deviation;5.12 BOTH SEXES;II;Mean;19.02 BOTH SEXES;II;Standard deviation;7.84 BOTH SEXES;III;Mean;17.82 BOTH SEXES;III;Standard deviation;4.74 BOTH SEXES;IV;Mean;17.75 BOTH SEXES;IV;Standard deviation;4.58 BOTH SEXES;V;Mean;17.47 BOTH SEXES;V;Standard deviation;4.51 BOTH SEXES;VI;Mean;17.53 BOTH SEXES;VI;Standard deviation;5.12 BOTH SEXES;Not recorded;Mean;17.95 BOTH SEXES;Not recorded;Standard deviation;5.45 Men;Total;Mean;17.45 Men;Total;Standard deviation;4.64 Men;I;Mean;17.95 Men;I;Standard deviation;4.21 Men;II;Mean;18.61 Men;II;Standard deviation;7.11 Men;III;Mean;17.91 Men;III;Standard deviation;4.83 Men;IV;Mean;17.52 Men;IV;Standard deviation;4.61 Men;V;Mean;17.21 Men;V;Standard deviation;4.35 Men;VI;Mean;16.79 Men;VI;Standard deviation;3.83 Men;Not recorded;Mean;16.65 Men;Not recorded;Standard deviation;4.66 Women;Total;Mean;18.13 Women;Total;Standard deviation;5.41 Women;I;Mean;18.05 Women;I;Standard deviation;6.04 Women;II;Mean;19.73 Women;II;Standard deviation;8.92 Women;III;Mean;17.72 Women;III;Standard deviation;4.64 Women;IV;Mean;18.15 Women;IV;Standard deviation;4.50 Women;V;Mean;17.89 Women;V;Standard deviation;4.71 Women;VI;Mean;18.61 Women;VI;Standard deviation;6.40 Women;Not recorded;Mean;18.86 Women;Not recorded;Standard deviation;5.77