| Period | Value | YoY Chg | Change % | Date |
|---|---|---|---|---|
| Q3 2024 | 58.3 | +0.78 | +1.36% | Sep 30, 2024 |
| Q2 2024 | 57.5 | -0.02 | -0.04% | Jun 30, 2024 |
| Q1 2024 | 57.2 | -0.74 | -1.28% | Mar 31, 2024 |
| Q4 2023 | 58 | +0.01 | +0.02% | Dec 31, 2023 |
| Q3 2023 | 57.6 | -0.79 | -1.35% | Sep 30, 2023 |
| Q2 2023 | 57.5 | -0.83 | -1.42% | Jun 30, 2023 |
| Q1 2023 | 58 | +0.22 | +0.38% | Mar 31, 2023 |
| Q4 2022 | 58 | +0.6 | +1.05% | Dec 31, 2022 |
| Q3 2022 | 58.3 | +0.87 | +1.51% | Sep 30, 2022 |
| Q2 2022 | 58.4 | +0.92 | +1.6% | Jun 30, 2022 |
| Q1 2022 | 57.8 | +0.35 | +0.61% | Mar 31, 2022 |
| Q4 2021 | 57.4 | +0.2 | +0.35% | Dec 31, 2021 |
| Q3 2021 | 57.5 | +1.64 | +2.94% | Sep 30, 2021 |
| Q2 2021 | 57.5 | +1.31 | +2.33% | Jun 30, 2021 |
| Q1 2021 | 57.4 | +0.87 | +1.54% | Mar 31, 2021 |
| Q4 2020 | 57.2 | +0.67 | +1.19% | Dec 31, 2020 |
| Q3 2020 | 55.8 | -0.91 | -1.6% | Sep 30, 2020 |
| Q2 2020 | 56.1 | -1.5 | -2.6% | Jun 30, 2020 |
| Q1 2020 | 56.5 | -2.03 | -3.47% | Mar 31, 2020 |
| Q4 2019 | 56.6 | -4.4 | -7.22% | Dec 31, 2019 |
| Q3 2019 | 56.7 | -7.85 | -12.2% | Sep 30, 2019 |
| Q2 2019 | 57.6 | -8.67 | -13.1% | Jun 30, 2019 |
| Q1 2019 | 58.6 | -9.72 | -14.2% | Mar 31, 2019 |
| Q4 2018 | 61 | -8.95 | -12.8% | Dec 31, 2018 |
| Q3 2018 | 64.6 | -6.94 | -9.7% | Sep 30, 2018 |
| Q2 2018 | 66.3 | -5.66 | -7.86% | Jun 30, 2018 |
| Q1 2018 | 68.3 | -3.77 | -5.23% | Mar 31, 2018 |
| Q4 2017 | 69.9 | -2.46 | -3.4% | Dec 31, 2017 |
| Q3 2017 | 71.5 | -0.89 | -1.23% | Sep 30, 2017 |
| Q2 2017 | 72 | -2.19 | -2.95% | Jun 30, 2017 |
| Q1 2017 | 72.1 | -4.39 | -5.74% | Mar 31, 2017 |
| Q4 2016 | 72.4 | -5.9 | -7.54% | Dec 31, 2016 |
| Q3 2016 | 72.4 | -8 | -9.95% | Sep 30, 2016 |
| Q2 2016 | 74.2 | -7.27 | -8.93% | Jun 30, 2016 |
| Q1 2016 | 76.5 | -6.75 | -8.11% | Mar 31, 2016 |
| Q4 2015 | 78.3 | -6.68 | -7.86% | Dec 31, 2015 |
| Q3 2015 | 80.4 | -6.29 | -7.25% | Sep 30, 2015 |
| Q2 2015 | 81.4 | -5.1 | -5.89% | Jun 30, 2015 |
| Q1 2015 | 83.2 | -3.12 | -3.62% | Mar 31, 2015 |
| Q4 2014 | 85 | -0.84 | -0.98% | Dec 31, 2014 |
| Q3 2014 | 86.7 | -1.13 | -1.29% | Sep 30, 2014 |
| Q2 2014 | 86.5 | -7.78 | -8.25% | Jun 30, 2014 |
| Q1 2014 | 86.3 | -16.4 | -15.9% | Mar 31, 2014 |
| Q4 2013 | 85.8 | -26.6 | -23.7% | Dec 31, 2013 |
| Q3 2013 | 87.8 | -29.2 | -24.9% | Sep 30, 2013 |
| Q2 2013 | 94.3 | -19.5 | -17.1% | Jun 30, 2013 |
| Q1 2013 | 103 | -8.35 | -7.52% | Mar 31, 2013 |
| Q4 2012 | 112 | +2.65 | +2.42% | Dec 31, 2012 |
| Q3 2012 | 117 | +9.33 | +8.66% | Sep 30, 2012 |
| Q2 2012 | 114 | -0.2 | -0.18% | Jun 30, 2012 |
| Q1 2012 | 111 | -10.1 | -8.35% | Mar 31, 2012 |
| Q4 2011 | 110 | -19.8 | -15.3% | Dec 31, 2011 |
| Q3 2011 | 108 | Sep 30, 2011 | ||
| Q2 2011 | 114 | Jun 30, 2011 | ||
| Q1 2011 | 121 | Mar 31, 2011 | ||
| Q4 2010 | 130 | Dec 31, 2010 |