1.971    0.0033
1.972    0.0092
1.973    0.0246
1.974    0.0619
1.975    0.1474
1.976    0.3319
1.977    0.7066
1.978    1.4224
1.979    2.7074
1.980    4.8727
1.981    8.2924
1.982   13.3440
1.983   20.3041
1.984   29.2130
1.985   39.7430
1.986   51.1257
1.987   62.1887
1.989   70.0000
1.989   70.0000
1.990   70.0000
1.991   70.0000
1.992   70.0000
1.993   62.1887
1.994   51.1257
1.995   39.7430
1.996   29.2130
1.997   20.3041
1.998   13.3440
1.999    8.2924
2.000    4.8727
2.001    2.7074
2.002    1.4224
2.003    0.7066
2.004    0.3319
2.005    0.1474
2.006    0.0619