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I. Demographic trends
II. Survival curves
     A. Description
     B. U.S. survival curves
          1. 1900
          2. 1990
     C. Possible future survival curves
          1. Increasing mean longevity (ML)
          2. Increasing maximum longevity (XL)
          3. Increasing ML and XL
          4. Effects on populations
          5. Consequences
III. Career opportunities
IV. Global responsibility

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