Sex;Social class;Average number;Total BOTH SEXES;Total;Average;1.82 BOTH SEXES;Total;Standard deviation;2.26 BOTH SEXES;I;Average;1.79 BOTH SEXES;I;Standard deviation;4.70 BOTH SEXES;II;Average;1.74 BOTH SEXES;II;Standard deviation;1.47 BOTH SEXES;III;Average;1.67 BOTH SEXES;III;Standard deviation;1.43 BOTH SEXES;IV;Average;1.82 BOTH SEXES;IV;Standard deviation;1.83 BOTH SEXES;V;Average;1.83 BOTH SEXES;V;Standard deviation;1.90 BOTH SEXES;VI;Average;1.94 BOTH SEXES;VI;Standard deviation;1.87 BOTH SEXES;No data recorded;Average;2.26 BOTH SEXES;No data recorded;Standard deviation;3.35 MALES;Total;Average;1.73 MALES;Total;Standard deviation;2.50 MALES;I;Average;2.04 MALES;I;Standard deviation;6.90 MALES;II;Average;1.63 MALES;II;Standard deviation;1.51 MALES;III;Average;1.63 MALES;III;Standard deviation;1.28 MALES;IV;Average;1.75 MALES;IV;Standard deviation;1.83 MALES;V;Average;1.67 MALES;V;Standard deviation;1.36 MALES;VI;Average;1.82 MALES;VI;Standard deviation;1.68 MALES;No data recorded;Average;1.86 MALES;No data recorded;Standard deviation;1.31 FEMALES;Total;Average;1.90 FEMALES;Total;Standard deviation;2.02 FEMALES;I;Average;1.60 FEMALES;I;Standard deviation;1.13 FEMALES;II;Average;1.83 FEMALES;II;Standard deviation;1.43 FEMALES;III;Average;1.70 FEMALES;III;Standard deviation;1.55 FEMALES;IV;Average;1.90 FEMALES;IV;Standard deviation;1.81 FEMALES;V;Average;1.97 FEMALES;V;Standard deviation;2.27 FEMALES;VI;Average;2.01 FEMALES;VI;Standard deviation;1.98 FEMALES;No data recorded;Average;2.54 FEMALES;No data recorded;Standard deviation;4.19