Sex;Social class;Average number;Total BOTH SEXES;Total;Average;1.79 BOTH SEXES;Total;Standard deviation;1.66 BOTH SEXES;I;Average;1.85 BOTH SEXES;I;Standard deviation;1.81 BOTH SEXES;II;Average;1.70 BOTH SEXES;II;Standard deviation;1.27 BOTH SEXES;III;Average;1.69 BOTH SEXES;III;Standard deviation;1.42 BOTH SEXES;IV;Average;1.75 BOTH SEXES;IV;Standard deviation;1.49 BOTH SEXES;V;Average;1.78 BOTH SEXES;V;Standard deviation;1.46 BOTH SEXES;VI;Average;1.95 BOTH SEXES;VI;Standard deviation;2.25 BOTH SEXES;No data recorded;Average;2.08 BOTH SEXES;No data recorded;Standard deviation;2.89 MALES;Total;Average;1.73 MALES;Total;Standard deviation;1.45 MALES;I;Average;1.86 MALES;I;Standard deviation;1.55 MALES;II;Average;1.74 MALES;II;Standard deviation;1.37 MALES;III;Average;1.65 MALES;III;Standard deviation;1.15 MALES;IV;Average;1.70 MALES;IV;Standard deviation;1.31 MALES;V;Average;1.68 MALES;V;Standard deviation;1.40 MALES;VI;Average;1.86 MALES;VI;Standard deviation;2.07 MALES;No data recorded;Average;1.86 MALES;No data recorded;Standard deviation;1.54 FEMALES;Total;Average;1.84 FEMALES;Total;Standard deviation;1.82 FEMALES;I;Average;1.83 FEMALES;I;Standard deviation;2.02 FEMALES;II;Average;1.66 FEMALES;II;Standard deviation;1.14 FEMALES;III;Average;1.73 FEMALES;III;Standard deviation;1.61 FEMALES;IV;Average;1.79 FEMALES;IV;Standard deviation;1.63 FEMALES;V;Average;1.87 FEMALES;V;Standard deviation;1.52 FEMALES;VI;Average;2.01 FEMALES;VI;Standard deviation;2.35 FEMALES;No data recorded;Average;2.18 FEMALES;No data recorded;Standard deviation;3.31