| Initial values | % change in parameter values | |||
| −50% | −20% | 20% | 50% | |
| a | 0.5a | 0.8a | 1.2a | 1.5a |
| 15 × 107 | 7.5 × 107 | 1.20 × 108 | 1.80 × 108 | 2.25 × 108 |
| b | 0.5b | 0.8b | 1.2b | 1.5b |
| 3.62 | 1.81 | 2.896 | 4.344 | 5.43 |
| α | 0.5α | 0.8α | 1.2α | 1.5α |
| 0.01 | 0.005 | 0.0025 | 0.012 | 0.015 |
| β | 0.5β | 0.8β | 1.2β | 1.5β |
| 10 | 5 | 8 | 12 | 15 |
| c1 | 0.5c1 | 0.8c1 | 1.2c1 | 1.5c1 |
| 2.5 | 1.25 | 2 | 3 | 3.75 |
| c2 | 0.5c2 | 0.8c2 | 1.2c2 | 1.5c2 |
| 5 | 2.5 | 4 | 6 | 7.5 |
| c3 | 0.5c3 | 0.8c3 | 1.2c3 | 1.5c3 |
| 500 | 250 | 400 | 600 | 750 |