| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Lowest | Mon 1/23 -1.19 | Thu 2/9 -1.19 | Sat 3/10 -1.49 | Sun 4/8 -1.88 | Mon 5/7 -1.88 | Tue 6/5 -1.68 | Wed 7/4 -1.39 | Thu 8/2 -0.99 | Tue 9/18 -1.09 | Wed 10/17 -1.58 | Thu 11/15 -1.88 | Fri 12/14 -1.98 |
| Highest | Sun 1/22 10.69 | Thu 2/9 10.49 | Sun 3/11 10.99 | Mon 4/9 11.58 | Sun 5/6 11.78 | Mon 6/4 11.78 | Tue 7/3 11.39 | Wed 8/1 10.99 | Wed 9/19 10.99 | Wed 10/17 11.48 | Thu 11/15 11.78 | Thu 12/13 11.68 |