The Trustees set key demographic, economic, and programmatic assumptions for three alternative scenarios. The intermediate assumptions reflect the Trustees’ best estimates of future experience. Therefore, most of the results presented in this overview indicate outcomes under the intermediate assumptions only. Any projection of the future is uncertain. For this reason, results are also presented under low-cost and high-cost alternatives to provide a range of possible future outcomes. The actual future costs are unlikely to be as extreme as those portrayed by the low-cost or high-cost projections. A separate section on the uncertainty of the projections, beginning on page 19, highlights the implications of these alternative scenarios.For each of the three alternative scenarios, table II.C1 presents key demographic, economic, and programmatic assumptions used for long-range projections. The measures shown are applicable for the last 65 years of the 75‑year projection period, unless otherwise specified. Details on near-term assumptions about growth rates and parameter levels are provided in Chapter V.
Total fertility rate (children per woman) for years
2040 and later
Measures shown in this table are applicable for the last 65 years of the 75-year projection period (years 2034-98), unless otherwise specified. See chapter V for additional details, including historical and projected values.
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