| 1954-07-01 0.0 |
| 1954-10-10 0.034482758620689655 |
| 1958-10-17 0.06896551724137931 |
| 1959-05-24 0.10344827586206896 |
| 1960-05-12 0.13793103448275862 |
| 1965-02-21 0.1724137931034483 |
| 1966-06-19 0.20689655172413793 |
| 1968-06-06 0.2413793103448276 |
| 1971-09-26 0.27586206896551724 |
| 1972-10-24 0.3103448275862069 |
| 1973-10-22 0.3448275862068966 |
| 1973-10-22 0.3448275862068966 |
| 1975-06-21 0.41379310344827586 |
| 1975-10-20 0.4482758620689655 |
| 1975-10-20 0.4482758620689655 |
| 1976-03-26 0.5172413793103449 |
| 1978-03-07 0.5517241379310345 |
| 1980-07-06 0.5862068965517241 |
| 1991-05-13 0.6206896551724138 |
| 1991-06-09 0.6551724137931034 |
| 1991-06-20 0.6896551724137931 |
| 1992-05-18 0.7241379310344828 |
| 1999-09-22 0.7586206896551724 |
| 2000-10-18 0.7931034482758621 |
| 2001-03-08 0.8275862068965517 |
| 2003-09-03 0.8620689655172413 |
| 2005-08-05 0.896551724137931 |
| 2006-10-25 0.9310344827586207 |
| 2012-04-23 0.9655172413793104 |
| 2013-04-09 1.0 |
