Sex;Social class;Average number;Total BOTH SEXES;Total;Average;1.49 BOTH SEXES;Total;Standard deviation;2.66 BOTH SEXES;I;Average;1.08 BOTH SEXES;I;Standard deviation;2.04 BOTH SEXES;II;Average;1.26 BOTH SEXES;II;Standard deviation;2.38 BOTH SEXES;III;Average;1.33 BOTH SEXES;III;Standard deviation;2.43 BOTH SEXES;IV;Average;1.39 BOTH SEXES;IV;Standard deviation;2.52 BOTH SEXES;V;Average;1.63 BOTH SEXES;V;Standard deviation;2.85 BOTH SEXES;VI;Average;1.81 BOTH SEXES;VI;Standard deviation;2.98 BOTH SEXES;No data recorded;Average;1.89 BOTH SEXES;No data recorded;Standard deviation;3.25 MALES;Total;Average;1.23 MALES;Total;Standard deviation;2.39 MALES;I;Average;0.94 MALES;I;Standard deviation;1.77 MALES;II;Average;1.07 MALES;II;Standard deviation;2.14 MALES;III;Average;1.06 MALES;III;Standard deviation;2.14 MALES;IV;Average;1.15 MALES;IV;Standard deviation;2.20 MALES;V;Average;1.45 MALES;V;Standard deviation;2.73 MALES;VI;Average;1.34 MALES;VI;Standard deviation;2.56 MALES;No data recorded;Average;1.31 MALES;No data recorded;Standard deviation;2.30 FEMALES;Total;Average;1.74 FEMALES;Total;Standard deviation;2.88 FEMALES;I;Average;1.23 FEMALES;I;Standard deviation;2.29 FEMALES;II;Average;1.43 FEMALES;II;Standard deviation;2.55 FEMALES;III;Average;1.57 FEMALES;III;Standard deviation;2.63 FEMALES;IV;Average;1.69 FEMALES;IV;Standard deviation;2.84 FEMALES;V;Average;1.82 FEMALES;V;Standard deviation;2.96 FEMALES;VI;Average;2.17 FEMALES;VI;Standard deviation;3.23 FEMALES;No data recorded;Average;2.14 FEMALES;No data recorded;Standard deviation;3.55