| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|
| 1 | 11.5 | 8.8 | 7.2 | 6.8 | 11.1 | | | | | | | |
|---|
| 2 | 11.3 | 6.6 | 6.1 | 7.1 | 12.0 | | | | | | | |
|---|
| 3 | 12.3 | 10.0 | 7.5 | 6.2 | 18.6 | | | | | | | |
|---|
| 4 | 11.3 | 11.5 | 7.3 | 5.6 | 17.0 | | | | | | | |
|---|
| 5 | 11.3 | 6.4 | 8.7 | 7.2 | 17.1 | | | | | | | |
|---|
| 6 | 9.5 | 6.8 | 12.5 | 7.3 | 20.5 | | | | | | | |
|---|
| 7 | 9.8 | 6.0 | 10.5 | 8.7 | 18.5 | | | | | | | |
|---|
| 8 | 12.3 | 6.2 | 9.7 | 9.2 | 19.3 | | | | | | | |
|---|
| 9 | 10.3 | 6.6 | 7.2 | 9.0 | 16.4 | | | | | | | |
|---|
| 10 | 5.0 | 5.0 | 4.3 | 9.2 | 19.4 | | | | | | | |
|---|
| 11 | 5.6 | 3.8 | 2.9 | 8.5 | 17.2 | | | | | | | |
|---|
| 12 | 5.5 | 3.3 | 3.9 | 13.6 | 16.8 | | | | | | | |
|---|
| 13 | 5.0 | 4.2 | 5.7 | 14.1 | 17.5 | | | | | | | |
|---|
| 14 | 4.2 | 10.7 | 5.6 | 22.9 | 15.0 | | | | | | | |
|---|
| 15 | 5.6 | 9.2 | 8.2 | 18.0 | 15.5 | | | | | | | |
|---|
| 16 | 4.0 | 10.0 | 8.6 | 16.3 | 15.5 | | | | | | | |
|---|
| 17 | 3.5 | 6.9 | 9.6 | 19.2 | 12.0 | | | | | | | |
|---|
| 18 | 2.2 | 6.7 | 9.4 | 15.6 | 16.9 | | | | | | | |
|---|
| 19 | 1.5 | 7.9 | 7.6 | 11.3 | 14.4 | | | | | | | |
|---|
| 20 | 1.6 | 6.4 | 6.6 | 9.5 | 13.8 | | | | | | | |
|---|
| 21 | 3.4 | 3.2 | 8.5 | 12.9 | 14.9 | | | | | | | |
|---|
| 22 | 4.9 | 3.0 | 7.9 | 15.0 | 16.5 | | | | | | | |
|---|
| 23 | 3.9 | 3.3 | 3.7 | 19.1 | 12.6 | | | | | | | |
|---|
| 24 | 4.0 | 3.6 | 3.9 | 19.6 | 11.4 | | | | | | | |
|---|
| 25 | 2.6 | 5.4 | 4.7 | 24.2 | | | | | | | | |
|---|
| 26 | 8.1 | 5.9 | 4.8 | 14.3 | | | | | | | | |
|---|
| 27 | 11.1 | 6.1 | 4.8 | 10.2 | | | | | | | | |
|---|
| 28 | 12.2 | 6.0 | 5.1 | 14.8 | | | | | | | | |
|---|
| 29 | 14.1 | | 6.5 | 16.0 | | | | | | | | |
|---|
| 30 | 13.0 | | 6.0 | 11.2 | | | | | | | | |
|---|
| 31 | 12.3 | | 6.1 | | | | | | | | | |
|---|