SEX;SOCIAL CLASS;INDICATOR;Total BOTH SEXES;Total;Mean;21.23 BOTH SEXES;Total;Standard deviation;14.27 BOTH SEXES;I;Mean;18.83 BOTH SEXES;I;Standard deviation;13.34 BOTH SEXES;II;Mean;20.43 BOTH SEXES;II;Standard deviation;13.61 BOTH SEXES;III;Mean;21.41 BOTH SEXES;III;Standard deviation;14.47 BOTH SEXES;IV;Mean;21.51 BOTH SEXES;IV;Standard deviation;14.11 BOTH SEXES;V;Mean;22.32 BOTH SEXES;V;Standard deviation;14.38 BOTH SEXES;VI;Mean;21.14 BOTH SEXES;VI;Standard deviation;14.77 BOTH SEXES;Not recorded;Mean;20.69 BOTH SEXES;Not recorded;Standard deviation;15.32 Men;Total;Mean;22.24 Men;Total;Standard deviation;14.34 Men;I;Mean;19.89 Men;I;Standard deviation;13.39 Men;II;Mean;22.10 Men;II;Standard deviation;13.72 Men;III;Mean;21.92 Men;III;Standard deviation;14.10 Men;IV;Mean;22.50 Men;IV;Standard deviation;14.18 Men;V;Mean;23.62 Men;V;Standard deviation;14.57 Men;VI;Mean;21.43 Men;VI;Standard deviation;15.22 Men;Not recorded;Mean;22.45 Men;Not recorded;Standard deviation;14.90 Women;Total;Mean;19.82 Women;Total;Standard deviation;14.06 Women;I;Mean;17.52 Women;I;Standard deviation;13.15 Women;II;Mean;18.28 Women;II;Standard deviation;13.16 Women;III;Mean;20.79 Women;III;Standard deviation;14.87 Women;IV;Mean;19.77 Women;IV;Standard deviation;13.82 Women;V;Mean;20.32 Women;V;Standard deviation;13.84 Women;VI;Mean;20.74 Women;VI;Standard deviation;14.13 Women;Not recorded;Mean;19.15 Women;Not recorded;Standard deviation;15.51