Population size used for calculation purposes for birth and adolescent cohorts | 1 000 000 |

Birth cohort | |

2003 US Census estimate for size of the US birth cohort | 4 026 538 |

Ratio by which total outcomes and costs were multiplied | 4.026538 (4 026 538 divided by 1 000 000 = 4.026538) |

Adolescent cohort | |

2003 US Census estimate for number of persons aged 10 to 14 y | 21 193 360 (21 193 360 divided by 5 = 4 238 672) |

Estimated number of US 11-year-olds in 2003 | 4 238 672 |

Ratio by which total outcomes and costs were multiplied | 4.238672 (4 238 672 divided by 1 000 000 = 4.238672) |