| Period | Value | YoY Chg | Change % | Date |
|---|---|---|---|---|
| Q2 2024 | 56.3 | -3.32 | -5.57% | Jun 30, 2024 |
| Q1 2024 | 56.5 | -5.48 | -8.84% | Mar 31, 2024 |
| Q4 2023 | 57.1 | -5.83 | -9.27% | Dec 31, 2023 |
| Q3 2023 | 58.7 | -4.38 | -6.95% | Sep 30, 2023 |
| Q2 2023 | 59.7 | -3.09 | -4.92% | Jun 30, 2023 |
| Q1 2023 | 62 | +2.02 | +3.37% | Mar 31, 2023 |
| Q4 2022 | 62.9 | +2.31 | +3.81% | Dec 31, 2022 |
| Q3 2022 | 63.1 | +1.86 | +3.04% | Sep 30, 2022 |
| Q2 2022 | 62.8 | +0.17 | +0.27% | Jun 30, 2022 |
| Q1 2022 | 60 | -3.82 | -5.99% | Mar 31, 2022 |
| Q4 2021 | 60.6 | -6.43 | -9.59% | Dec 31, 2021 |
| Q3 2021 | 61.2 | -6.28 | -9.31% | Sep 30, 2021 |
| Q2 2021 | 62.6 | -3.84 | -5.78% | Jun 30, 2021 |
| Q1 2021 | 63.8 | -2.19 | -3.32% | Mar 31, 2021 |
| Q4 2020 | 67 | +3.34 | +5.24% | Dec 31, 2020 |
| Q3 2020 | 67.5 | +3.84 | +6.03% | Sep 30, 2020 |
| Q2 2020 | 66.4 | +2.26 | +3.52% | Jun 30, 2020 |
| Q1 2020 | 66 | +1.19 | +1.84% | Mar 31, 2020 |
| Q4 2019 | 63.7 | -1.38 | -2.12% | Dec 31, 2019 |
| Q3 2019 | 63.7 | -0.19 | -0.3% | Sep 30, 2019 |
| Q2 2019 | 64.2 | +2.91 | +4.75% | Jun 30, 2019 |
| Q1 2019 | 64.8 | +4.67 | +7.77% | Mar 31, 2019 |
| Q4 2018 | 65.1 | +4.98 | +8.29% | Dec 31, 2018 |
| Q3 2018 | 63.8 | +3.58 | +5.94% | Sep 30, 2018 |
| Q2 2018 | 61.3 | -1.08 | -1.73% | Jun 30, 2018 |
| Q1 2018 | 60.1 | -3.44 | -5.41% | Mar 31, 2018 |
| Q4 2017 | 60.1 | -4.13 | -6.43% | Dec 31, 2017 |
| Q3 2017 | 60.3 | -6.32 | -9.49% | Sep 30, 2017 |
| Q2 2017 | 62.3 | -6.11 | -8.93% | Jun 30, 2017 |
| Q1 2017 | 63.6 | -6.77 | -9.62% | Mar 31, 2017 |
| Q4 2016 | 64.2 | -8.42 | -11.6% | Dec 31, 2016 |
| Q3 2016 | 66.6 | -7.4 | -10% | Sep 30, 2016 |
| Q2 2016 | 68.5 | -6.5 | -8.67% | Jun 30, 2016 |
| Q1 2016 | 70.4 | -5.72 | -7.52% | Mar 31, 2016 |
| Q4 2015 | 72.7 | -3.36 | -4.42% | Dec 31, 2015 |
| Q3 2015 | 74 | -2.22 | -2.91% | Sep 30, 2015 |
| Q2 2015 | 75 | -1.33 | -1.74% | Jun 30, 2015 |
| Q1 2015 | 76.1 | -0.06 | -0.08% | Mar 31, 2015 |
| Q4 2014 | 76 | -0.66 | -0.86% | Dec 31, 2014 |
| Q3 2014 | 76.2 | -0.41 | -0.54% | Sep 30, 2014 |
| Q2 2014 | 76.3 | -0.15 | -0.2% | Jun 30, 2014 |
| Q1 2014 | 76.1 | -0.11 | -0.14% | Mar 31, 2014 |
| Q4 2013 | 76.7 | +1.3 | +1.73% | Dec 31, 2013 |
| Q3 2013 | 76.6 | +1.52 | +2.03% | Sep 30, 2013 |
| Q2 2013 | 76.4 | +1.7 | +2.28% | Jun 30, 2013 |
| Q1 2013 | 76.2 | +0.67 | +0.89% | Mar 31, 2013 |
| Q4 2012 | 75.4 | -0.84 | -1.1% | Dec 31, 2012 |
| Q3 2012 | 75.1 | -2.3 | -2.97% | Sep 30, 2012 |
| Q2 2012 | 74.7 | -3.88 | -4.94% | Jun 30, 2012 |
| Q1 2012 | 75.6 | -2.38 | -3.05% | Mar 31, 2012 |
| Q4 2011 | 76.2 | Dec 31, 2011 | ||
| Q3 2011 | 77.4 | Sep 30, 2011 | ||
| Q2 2011 | 78.6 | Jun 30, 2011 | ||
| Q1 2011 | 78 | Mar 31, 2011 |