| Jan | Feb | March | April | May | June | July | Aug | Sept | Oct | Nov | Dec |
| 1 | 1009.6 | 1011.6 | | | | | | | | | | |
| 2 | 1011.9 | 1009.7 | | | | | | | | | | |
| 3 | 1021.8 | 1006.8 | | | | | | | | | | |
| 4 | 1019.1 | 1022.6 | | | | | | | | | | |
| 5 | 1023.9 | 1025.7 | | | | | | | | | | |
| 6 | 1019.4 | 1022.4 | | | | | | | | | | |
| 7 | 1013.8 | 1021.2 | | | | | | | | | | |
| 8 | 1012.2 | 1020.4 | | | | | | | | | | |
| 9 | 1010.3 | 1023.2 | | | | | | | | | | |
| 10 | 1011.5 | 1023.8 | | | | | | | | | | |
| 11 | 1008.8 | 1022.6 | | | | | | | | | | |
| 12 | 1017.1 | 1025.3 | | | | | | | | | | |
| 13 | 1019.1 | 1015.5 | | | | | | | | | | |
| 14 | 1009.0 | 1009.7 | | | | | | | | | | |
| 15 | 1010.1 | 1009.9 | | | | | | | | | | |
| 16 | 1016.6 | 1008.5 | | | | | | | | | | |
| 17 | 1024.5 | | | | | | | | | | | |
| 18 | 1027.1 | | | | | | | | | | | |
| 19 | 1019.6 | | | | | | | | | | | |
| 20 | 1018.2 | | | | | | | | | | | |
| 21 | 1012.1 | | | | | | | | | | | |
| 22 | 997.9 | | | | | | | | | | | |
| 23 | 986.1 | | | | | | | | | | | |
| 24 | 982.1 | | | | | | | | | | | |
| 25 | 1015.3 | | | | | | | | | | | |
| 26 | 998.2 | | | | | | | | | | | |
| 27 | 1008.7 | | | | | | | | | | | |
| 28 | 1021.9 | | | | | | | | | | | |
| 29 | 1024.1 | | | | | | | | | | | |
| 30 | 1022.6 | | | | | | | | | | | |
| 31 | 1016.7 | | | | | | | | | | | |
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