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| Year | January | February | March | April | May | June | July | August | September | October | November | December | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4 | 2018 | 5.6665 | 6.0392 | 6.2743 | 6.1508 | 6.3319 | 5.8861 | 6.2006 | 5.6836 | 5.9909 | 6.4217 | 6.1083 | 6.1695 |
| 5 | 2019 | 5.9376 | 4.5030 | 4.4809 | 4.4388 | 4.7427 | 5.0244 | 5.1095 | 3.6436 | 4.1092 | 4.2472 | 4.2786 | 4.2460 |
| 6 | 2020 | 3.7636 | 4.3420 | 4.3285 | 4.0639 | 4.0698 | 3.9601 | 3.6318 | 3.9712 | 3.8528 | 3.6579 | 3.8418 | 3.8807 |
| 7 | 2021 | 3.7654 | 4.1603 | 5.0442 | 5.4730 | 5.3612 | 5.1870 | 5.8770 | 6.3914 | 6.2054 | 5.2377 | 5.6646 | 5.8076 |
| 8 | 2022 | 6.1922 | 7.6668 | 9.1422 | 9.1900 | 9.7075 | 10.3318 | 11.7201 | 10.6794 | 13.1332 | 11.8258 | 11.0919 | 8.8636 |
| 9 | 2023 | 7.3430 | 8.3750 | 8.2890 | 7.5979 | 7.5218 | 7.1456 | 7.0155 | 6.5110 | 6.3784 | 7.0722 | 7.3862 | 6.1687 |
| 10 | 2024 | 6.4921 | 6.3361 | 6.3620 | 5.6784 | 6.3987 | 6.7152 | 7.1997 | 6.1284 | 6.9669 | 6.0281 | 6.6839 | 4.9326 |
| 11 | 2025 | 7.0250 | 7.6123 | 6.2917 |