| Jan | Feb | March | April | May | June | July | Aug | Sept | Oct | Nov | Dec |
|---|
| 1 | 29.4 | 24.4 | | | | | | | | | | |
|---|
| 2 | 27.7 | 32.5 | | | | | | | | | | |
|---|
| 3 | 19.5 | 29.7 | | | | | | | | | | |
|---|
| 4 | 20.9 | 20.0 | | | | | | | | | | |
|---|
| 5 | 24.5 | 22.4 | | | | | | | | | | |
|---|
| 6 | 28.0 | 26.2 | | | | | | | | | | |
|---|
| 7 | 28.6 | 29.5 | | | | | | | | | | |
|---|
| 8 | 24.4 | 28.2 | | | | | | | | | | |
|---|
| 9 | 32.6 | 26.3 | | | | | | | | | | |
|---|
| 10 | 32.3 | 28.0 | | | | | | | | | | |
|---|
| 11 | 36.4 | 25.3 | | | | | | | | | | |
|---|
| 12 | 28.0 | 26.4 | | | | | | | | | | |
|---|
| 13 | 28.8 | 30.5 | | | | | | | | | | |
|---|
| 14 | 28.8 | 21.4 | | | | | | | | | | |
|---|
| 15 | 24.2 | 17.0 | | | | | | | | | | |
|---|
| 16 | 30.9 | 24.5 | | | | | | | | | | |
|---|
| 17 | 19.5 | | | | | | | | | | | |
|---|
| 18 | 16.2 | | | | | | | | | | | |
|---|
| 19 | 19.5 | | | | | | | | | | | |
|---|
| 20 | 20.0 | | | | | | | | | | | |
|---|
| 21 | 17.0 | | | | | | | | | | | |
|---|
| 22 | 30.7 | | | | | | | | | | | |
|---|
| 23 | 29.1 | | | | | | | | | | | |
|---|
| 24 | 23.3 | | | | | | | | | | | |
|---|
| 25 | 25.7 | | | | | | | | | | | |
|---|
| 26 | 25.4 | | | | | | | | | | | |
|---|
| 27 | 24.8 | | | | | | | | | | | |
|---|
| 28 | 24.8 | | | | | | | | | | | |
|---|
| 29 | 31.5 | | | | | | | | | | | |
|---|
| 30 | 24.7 | | | | | | | | | | | |
|---|
| 31 | 30.6 | | | | | | | | | | | |
|---|
|
