|   t (years)  |       ab  |       t0.02  |       λ(t)  |    
|   1  |       0.0918  |       1  |       0.0918  |    
|   2  |       0.0918  |       1.014  |       0.0931  |    
|   3  |       0.0918  |       1.0222  |       0.0938  |    
|   4  |       0.0918  |       1.0281  |       0.0944  |    
|   5  |       0.0918  |       1.0327  |       0.0948  |    
|   6  |       0.0918  |       1.0365  |       0.0952  |    
|   7  |       0.0918  |       1.0397  |       0.0954  |    
|   8  |       0.0918  |       1.0425  |       0.0957  |    
|   9  |       0.0918  |       1.0449  |       0.0959  |    
|   10  |       0.0918  |       1.0471  |       0.0961  |