| Jan | Feb | March | April | May | June | July | Aug | Sept | Oct | Nov | Dec |
|---|
| 1 | 20.0 | 25.1 | 23.7 | | | | | | | | | |
|---|
| 2 | 21.6 | 33.1 | 26.4 | | | | | | | | | |
|---|
| 3 | 24.2 | 32.9 | 30.0 | | | | | | | | | |
|---|
| 4 | 23.9 | 33.1 | 27.4 | | | | | | | | | |
|---|
| 5 | 24.4 | 34.2 | 20.7 | | | | | | | | | |
|---|
| 6 | 27.3 | 31.5 | 17.4 | | | | | | | | | |
|---|
| 7 | 23.2 | 28.1 | 20.6 | | | | | | | | | |
|---|
| 8 | 24.5 | 28.6 | 25.5 | | | | | | | | | |
|---|
| 9 | 23.1 | 23.1 | 29.6 | | | | | | | | | |
|---|
| 10 | 20.5 | 21.4 | 27.0 | | | | | | | | | |
|---|
| 11 | 30.3 | 23.0 | 24.3 | | | | | | | | | |
|---|
| 12 | 20.7 | 21.3 | 25.7 | | | | | | | | | |
|---|
| 13 | 19.6 | 18.9 | 24.7 | | | | | | | | | |
|---|
| 14 | 21.5 | 21.9 | 20.1 | | | | | | | | | |
|---|
| 15 | 22.3 | 23.5 | 21.0 | | | | | | | | | |
|---|
| 16 | 25.4 | 21.9 | 27.1 | | | | | | | | | |
|---|
| 17 | 26.5 | 20.5 | 29.0 | | | | | | | | | |
|---|
| 18 | 22.9 | 21.1 | 25.8 | | | | | | | | | |
|---|
| 19 | 21.9 | 26.1 | 21.7 | | | | | | | | | |
|---|
| 20 | 30.7 | 27.2 | 27.7 | | | | | | | | | |
|---|
| 21 | 26.6 | 31.2 | 24.0 | | | | | | | | | |
|---|
| 22 | 28.9 | 29.6 | 18.7 | | | | | | | | | |
|---|
| 23 | 22.5 | 22.2 | 18.6 | | | | | | | | | |
|---|
| 24 | 22.6 | 20.4 | 18.4 | | | | | | | | | |
|---|
| 25 | 23.4 | 22.8 | 23.9 | | | | | | | | | |
|---|
| 26 | 28.6 | 29.0 | 28.6 | | | | | | | | | |
|---|
| 27 | 26.0 | 20.9 | 26.3 | | | | | | | | | |
|---|
| 28 | 23.3 | 22.1 | 25.1 | | | | | | | | | |
|---|
| 29 | 32.1 | | | | | | | | | | | |
|---|
| 30 | 30.0 | | | | | | | | | | | |
|---|
| 31 | 26.7 | | | | | | | | | | | |
|---|
|
