Algorithm | 14 | 24 | 30 | 39 | 57 |

binary particle swarm optimization | 5.5 | 9.6 | 13.9 | 17.2 | 24 |

Binary integer linear programming | 5.3 | 9 | 13.5 | 16.9 | 23.6 |

biogeography based optimization | 5.2 | 8.4 | 12.9 | 16.4 | 23.4 |

Adaptive clonal algorithm | 5.2 | 8 | 12.5 | 16 | 22.9 |

Proposed | 4.9 | 7.1 | 12 | 15.8 | 22.4 |