Table 1.
Trend scenarios expressed in percentage change between birth cohorts
| Trend Type | No. | 1910-19 to 1920-29 |
1920-29 to 1930-39 |
1930-39 to 1940-49 |
1940-49 to 1950-59 |
1950-59 to 1960-69 |
1960-69 to 1970-79 |
1970-79 to 1980-89 |
|---|---|---|---|---|---|---|---|---|
| No decline | 1.0 | 0% | 0% | 0% | 0% | 0% | 0% | 0% |
| Linear | 2.0 | -13% | -13% | -13% | -13% | -13% | -13% | -13% |
| Linear (low) | 2.1 | -7% | -7% | -7% | -7% | -7% | -7% | -7% |
| Linear (high) | 2.2 | -19% | -19% | -19% | -19% | -19% | -19% | -19% |
| Nonlinear stable | 3.0 | -13% | -13% | -13% | -10% | -7% | -5% | -4% |
| Nonlinear stable | 3.1 | -13% | -13% | -13% | 0% | 0% | 0% | 0% |
| Nonlinear decelerating | 4.0 | -18% | -13% | -8% | -5% | -3% | -1% | 0% |
| Nonlinear decelerating | 4.1 | -18% | -13% | -8% | 0% | 0% | 0% | 0% |
| Nonlinear decelerating | 4.2 | -22% | -11% | -5% | -4% | -3% | -2% | -1% |
| Nonlinear decelerating | 4.3 | -22% | -11% | -5% | 0% | 0% | 0% | 0% |
| Nonlinear decelerating | 4.4 | -24% | -12% | -2% | 0% | 0% | 0% | 0% |
| Nonlinear accelerating | 5.0 | -8 | -13% | -18% | -13% | -8% | -5% | -3% |
| Nonlinear accelerating | 5.1 | -5 | -11% | -22% | -11% | -5% | -3% | -1% |
| Nonlinear accelerating | 5.2 | -2 | -12% | -24% | -12% | -2% | 0% | 0% |