| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
1 | 16.5 | 12.9 | 9.5 | 18.3 | 17.9 | 27.9 | 27.6 | 28.3 | 26.9 | 31.5 | 17.3 | 18.8 |
2 | 16.2 | 13.2 | 15.1 | 21.0 | 21.1 | 26.8 | 29.2 | 29.8 | 31.2 | 31.1 | 20.2 | 16.8 |
3 | 17.1 | 13.6 | 16.7 | 20.2 | 24.7 | 27.9 | 29.7 | 26.4 | 32.6 | 26.7 | 16.9 | 13.3 |
4 | 17.7 | 14.5 | 15.6 | 15.3 | 23.5 | 26.8 | 29.1 | 25.2 | 31.2 | 26.6 | 17.4 | 7.3 |
5 | 17.2 | 13.6 | 15.9 | 15.4 | 23.8 | 25.5 | 27.9 | 28.7 | 29.9 | 27.3 | 18.6 | 9.1 |
6 | 16.7 | 11.2 | 14.8 | 14.7 | 22.8 | 25.8 | 29.7 | 28.5 | 30.6 | 27.7 | 20.1 | 12.7 |
7 | 12.1 | 10.9 | 14.7 | 15.7 | 24.6 | 27.3 | 33.7 | 29.7 | 30.7 | 27.6 | 19.0 | 13.4 |
8 | 13.6 | 9.3 | 15.2 | 18.3 | 26.3 | 27.6 | 35.4 | 29.7 | 33.6 | 27.2 | 17.9 | 7.7 |
9 | 15.8 | 7.4 | 16.8 | 18.3 | 25.8 | 27.2 | 35.9 | 28.0 | 31.9 | 27.3 | 16.8 | 13.3 |
10 | 16.9 | 11.0 | 18.1 | 17.4 | 21.3 | 25.6 | 35.4 | 29.6 | 32.4 | 25.8 | 15.9 | 16.2 |
11 | 9.6 | 14.8 | 18.3 | 14.9 | 19.9 | 28.9 | 33.2 | 32.8 | 30.6 | 26.2 | 17.2 | 14.5 |
12 | 14.3 | 13.7 | 19.0 | 17.8 | 19.8 | 29.1 | 32.1 | 35.4 | 28.7 | 25.7 | 16.3 | 16.1 |
13 | 13.3 | 14.5 | 17.4 | 16.4 | 21.4 | 26.3 | 30.5 | 33.2 | 27.8 | 25.2 | 18.0 | 15.2 |
14 | 14.3 | 15.6 | 16.7 | 18.1 | 19.4 | 27.3 | 34.4 | 34.6 | 29.3 | 24.3 | 19.3 | 15.4 |
15 | 12.7 | 13.9 | 18.2 | 17.3 | 22.4 | 28.6 | 32.8 | 32.2 | 29.1 | 24.3 | 23.2 | 16.9 |
16 | 12.8 | 12.9 | 15.6 | 21.9 | 19.9 | 29.2 | 32.2 | 32.0 | 28.4 | 19.3 | 16.6 | 15.3 |
17 | 11.7 | 14.7 | 17.2 | 18.5 | 21.4 | 29.5 | 32.6 | 32.9 | 29.8 | 22.3 | 19.1 | 15.2 |
18 | 12.7 | 13.7 | 16.8 | 21.3 | 23.9 | 29.8 | 33.3 | 34.1 | 26.3 | 19.6 | 18.8 | 16.5 |
19 | 9.8 | 16.2 | 14.1 | 21.4 | 18.1 | 29.0 | 33.5 | 35.4 | 27.0 | 20.9 | 11.3 | 15.3 |
20 | 9.3 | 17.2 | 18.7 | 19.0 | 20.4 | 31.9 | 32.6 | 37.9 | 23.9 | 22.9 | 19.1 | 9.0 |
21 | 8.6 | 13.5 | 18.7 | 21.3 | 28.2 | 33.1 | 31.8 | 37.6 | 25.4 | 18.6 | 16.3 | 13.5 |
22 | 10.3 | 14.0 | 19.1 | 23.4 | 26.6 | 34.3 | 30.5 | 37.8 | 21.7 | 21.8 | 17.2 | 16.3 |
23 | 9.3 | 16.0 | 19.1 | 21.8 | 25.4 | 29.5 | 31.1 | 39.1 | 23.3 | 20.3 | 19.2 | 15.8 |
24 | 14.0 | 13.7 | 18.6 | 20.9 | 25.8 | 32.4 | 33.7 | 36.5 | 25.6 | 21.4 | 17.9 | 15.8 |
25 | 12.7 | 13.3 | 18.3 | 21.1 | 28.7 | 31.4 | 29.1 | 33.8 | 26.2 | 22.1 | 12.8 | 13.2 |
26 | 12.2 | 12.3 | 16.6 | 21.7 | 30.5 | 31.7 | 31.3 | 32.6 | 28.1 | 20.7 | 14.4 | 11.2 |
27 | 9.0 | 10.4 | 20.1 | 22.2 | 28.9 | 31.5 | 30.2 | 29.6 | 29.4 | 21.9 | 12.6 | 12.5 |
28 | 8.8 | 12.6 | 16.8 | 20.4 | 28.1 | 31.7 | 28.1 | 24.1 | 29.8 | 22.1 | 16.2 | 14.2 |
29 | 12.2 | | 15.9 | 18.8 | 29.3 | 31.7 | 29.5 | 25.3 | 28.3 | 21.4 | 14.8 | 13.1 |
30 | 10.8 | | 17.2 | 25.1 | 30.2 | 24.7 | 29.4 | 25.6 | 28.6 | 22.4 | 17.4 | 13.7 |
31 | 15.6 | | 15.1 | | 26.9 | | 31.6 | 25.6 | | 20.1 | | 14.4 |