Additional Data and Information.-- Latest shifted rating.
Funding for this site is provided by the cooperators / programs below:
| Min (1981) | 25th percen- tile | Median | Mean | 75th percen- tile | Most Recent Instantaneous Value Oct 29 | Max (1998) |
|---|---|---|---|---|---|---|
| 3.20 | 4.6 | 5.3 | 6.1 | 6.7 | 9.96 | 15.0 |