Customer Service
800-331-3332 or 312-930-2316

|
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Yearly |
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1990 | 15.3 |
11.0 |
23.1 | 12.3 | 14.0 | 11.5 | 13.2 | 33.4 | 19.1 | 21.1 | 15.9 | 15.2 |
17.1 |
| 1991 | 31.5 | 13.9 | 8.8 | 7.8 | 9.6 | 10.9 | 6.9 | 9.5 | 10.0 | 5.9 | 8.1 | 11.5 |
11.2 |
| 1992 | 10.2 | 6.9 | 7.4 | 8.2 | 4.7 | 6.1 | 7.4 | 13.5 | 10.0 | 8.4 | 6.9 | 6.1 |
8.0 |
| 1993 | 5.0 | 8.9 | 6.5 | 10.9 | 15.2 | 11.2 | 13.6 | 24.2 | 24.7 | 10.3 | 12.7 | 8.9 |
12.7 |
| 1994 | 13.1 | 11.4 | 12.5 | 9.5 | 13.1 | 12.0 | 6.9 | 7.6 | 7.0 | 6.1 | 4.5 | 5.3 |
9.1 |
| 1995 | 11.3 | 4.1 | 9.5 | 8.0 | 6.8 | 6.2 | 5.9 | 4.2 | 4.9 | 2.9 | 7.6 | 3.8 |
6.3 |
| 1996 | 8.1 | 10.6 | 6.9 | 6.6 | 3.9 | 4.0 | 4.2 | 3.6 | 3.4 | 4.8 | 5.5 | 4.1 |
5.5 |
| 1997 | 15.6 | 10.8 | 12.4 | 6.5 | 9.2 | 7.8 | 16.1 | 11.9 | 8.9 | 29.0 | 21.4 | 15.8 |
13.8 |
| 1998 | 21.1 | 15.1 | 11.6 | 12.3 | 9.0 | 16.6 | 7.7 | 12.2 | 14.6 | 12.3 | 10.3 | 8.7 |
12.6 |
| 1999 | 10.5 | 8.2 | 10.7 | 7.6 | 12.3 | 8.8 | 11.3 | 8.0 | 37.9 | 35.4 | 18.6 | 16.4 |
15.5 |
| 2000 | 9.9 | 37.5 | 13.9 | 12.0 | 9.1 | 19.1 | 7.2 | 10.1 | 9.7 | 15.1 | 9.1 | 9.9 |
13.5 |
| 2001 | 7.7 | 13.4 | 14.8 | 10.3 | 24.0 | 17.1 | 9.2 | 11.1 | 28.7 | 20.0 | 9.9 | 11.8 |
14.8 |
| 2002 | 11.4 | 17.6 | 12.1 | 11.4 | 11.4 | 14.9 | 18.6 | 17.6 | 11.5 | 10.0 | 12.5 | 14.6 |
13.6 |
| 2003 | 14.1 | 24.2 | 19.2 | 14.7 | 15.6 | 19.5 | 14.7 | 15.8 | 13.1 | 19.3 | 15.1 | 7.6 |
16.1 |
| 2004 | 22.5 | 19.6 | 15.6 | 20.6 | 17.8 | 16.4 | 16.4 | 15.3 | 10.9 | 12.8 | 11.7 | 16.7 |
16.4 |
| 2005 | 10.7 | 10.5 | 12.6 | 10.0 | 8.0 | 9.9 | 8.6 | 12.2 | 11.5 | 14.2 | 12.4 | 18.1 |
11.6 |
| 2006 | 19.5 | 24.6 | 16.7 | 24.0 | 34.4 | 37.3 | 26.8 | 17.4 | 22.9 | 24.6 | 16.3 | 13.8 |
23.2 |
| 2007 | 18.5 | 20.0 | 16.3 | 12.0 | 14.8 | 14.2 | 13.1 | 17.1 | 11.3 | 16.1 | 27.4 | 16.1 |
16.1 |
| 2008 | 17.7 | 17.7 | 30.7 | 22.1 | 21.4 | 24.8 | 19.9 |
21.9 |
|||||
| Mean | 14.4 | 15.0 | 13.8 | 11.9 | 13.4 | 13.5 | 11.5 | 13.6 | 14.4 | 14.9 | 12.5 | 11.4 |
|
| High | 31.5 | 37.5 | 30.7 | 24.0 | 34.4 | 37.3 | 26.8 | 33.4 | 37.9 | 35.4 | 21.4 | 18.1 | |
| Low | 5.0 | 4.1 | 6.5 | 6.5 | 3.9 | 4.0 | 4.2 | 3.6 | 3.4 | 2.9 | 4.5 | 3.8 |