| Jan | Feb | March | April | May | June | July | Aug | Sept | Oct | Nov | Dec |
|---|
| 1 | 16.7 | 20.8 | 20.7 | 17.3 | 14.9 | 13.9 | 9.6 | 9.3 | 12.5 | 12.0 | 14.1 | 23.6 |
|---|
| 2 | 17.6 | 18.9 | 19.9 | 16.9 | 11.8 | 9.8 | 10.1 | 8.7 | 12.6 | 10.1 | 15.8 | 22.8 |
|---|
| 3 | 18.7 | 18.9 | 21.9 | 18.7 | 13.6 | 10.4 | 14.8 | 9.7 | 10.6 | 12.8 | 13.3 | 19.0 |
|---|
| 4 | 14.6 | 18.8 | 19.8 | 21.3 | 13.3 | 16.5 | 17.9 | 9.0 | 11.6 | 15.3 | 15.5 | 14.9 |
|---|
| 5 | 13.3 | 18.5 | 15.4 | 20.1 | 11.8 | 17.9 | 12.7 | 10.1 | 15.0 | 13.4 | 15.5 | 18.0 |
|---|
| 6 | 14.5 | 15.8 | 15.0 | 18.5 | 12.2 | 9.0 | 9.9 | 9.9 | 13.2 | 14.3 | 19.1 | 20.9 |
|---|
| 7 | 16.9 | 15.8 | 16.3 | 19.1 | 12.6 | 8.1 | 9.1 | 9.3 | 9.8 | 15.8 | 20.6 | 22.1 |
|---|
| 8 | 16.4 | 15.8 | 15.4 | 18.2 | 14.8 | 5.9 | 8.9 | 11.9 | 9.8 | 13.1 | 22.7 | 25.0 |
|---|
| 9 | 15.8 | 18.2 | 16.5 | 12.4 | 19.8 | 9.5 | 8.0 | 8.4 | 8.8 | 14.1 | 20.8 | 23.9 |
|---|
| 10 | 15.6 | 20.9 | 19.0 | 12.9 | 16.9 | 9.8 | 10.0 | 8.0 | 14.7 | 20.3 | 22.2 | 21.9 |
|---|
| 11 | 15.3 | 17.8 | 17.2 | 14.4 | 10.7 | 15.1 | 12.3 | 8.8 | 11.1 | 20.7 | 21.1 | 19.3 |
|---|
| 12 | 15.0 | 18.3 | 18.1 | 14.9 | 12.5 | 14.6 | 13.5 | 9.3 | 9.0 | 19.6 | 16.4 | 17.2 |
|---|
| 13 | 15.9 | 18.2 | 16.9 | 13.7 | 11.6 | 12.5 | 11.7 | 8.5 | 11.5 | 19.2 | 22.7 | 16.6 |
|---|
| 14 | 15.6 | 18.3 | 16.8 | 16.7 | 12.2 | 10.9 | 11.1 | 8.0 | 12.0 | 15.4 | 17.1 | 17.6 |
|---|
| 15 | 16.2 | 18.8 | 18.7 | 15.4 | 11.7 | 8.4 | 9.7 | 8.1 | 12.6 | 13.0 | 17.8 | 20.4 |
|---|
| 16 | 15.8 | 18.4 | 19.5 | 16.0 | 13.1 | 9.2 | 12.9 | 11.6 | 13.4 | 15.0 | 16.5 | 20.2 |
|---|
| 17 | 17.2 | 21.0 | 22.0 | 16.9 | 13.9 | 9.7 | 8.5 | 13.2 | 14.4 | 13.3 | 21.7 | |
|---|
| 18 | 16.4 | 24.4 | 22.1 | 19.2 | 17.8 | 9.1 | 10.9 | 11.5 | 16.7 | 16.9 | 21.6 | |
|---|
| 19 | 16.8 | 23.3 | 17.8 | 21.0 | 13.2 | 10.5 | 6.7 | 10.2 | 10.2 | 17.1 | 20.9 | |
|---|
| 20 | 17.1 | 24.5 | 16.8 | 22.1 | 11.1 | 12.6 | 8.5 | 8.0 | 10.2 | 16.7 | 22.6 | |
|---|
| 21 | 16.8 | 21.7 | 16.4 | 18.0 | 11.9 | 9.2 | 8.2 | 9.2 | 12.9 | 21.2 | 23.9 | |
|---|
| 22 | 16.4 | 18.5 | 18.0 | 15.6 | 8.3 | 9.6 | 10.0 | 8.7 | 16.4 | 19.6 | 23.0 | |
|---|
| 23 | 19.2 | 19.9 | 17.3 | 14.4 | 9.6 | 8.1 | 9.9 | 8.6 | 18.2 | 21.0 | 19.1 | |
|---|
| 24 | 19.2 | 20.0 | 17.0 | 12.0 | 10.6 | 7.3 | 9.0 | 9.3 | 16.9 | 18.1 | 17.5 | |
|---|
| 25 | 22.0 | 22.5 | 18.8 | 12.1 | 10.6 | 10.3 | 5.9 | 9.9 | 15.7 | 14.5 | 18.3 | |
|---|
| 26 | 22.8 | 19.8 | 17.9 | 14.9 | 14.0 | 16.1 | 6.6 | 9.6 | 13.3 | 15.0 | 21.7 | |
|---|
| 27 | 19.4 | 19.4 | 19.0 | 15.5 | 15.1 | 16.2 | 7.6 | 9.2 | 15.3 | 18.6 | 23.6 | |
|---|
| 28 | 16.8 | 19.8 | 16.4 | 16.9 | 13.5 | 13.9 | 8.7 | 13.9 | 16.8 | 15.6 | 23.6 | |
|---|
| 29 | 20.3 | | 17.3 | 16.2 | 14.9 | 9.6 | 14.4 | 14.1 | 18.5 | 11.9 | 20.8 | |
|---|
| 30 | 20.1 | | 16.3 | 18.3 | 14.7 | 9.3 | 13.2 | 14.4 | 14.1 | 13.7 | | |
|---|
| 31 | 21.0 | | 17.0 | | 14.1 | | 9.9 | 13.0 | | 15.6 | | |
|---|
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