| Period | Value | YoY Chg | Change % | Date |
|---|---|---|---|---|
| Q1 2024 | 78.8 | +7.51 | +10.5% | Mar 31, 2024 |
| Q4 2023 | 78.4 | +9.05 | +13.1% | Dec 31, 2023 |
| Q3 2023 | 76.6 | +7.58 | +11% | Sep 30, 2023 |
| Q2 2023 | 74.9 | +4.51 | +6.41% | Jun 30, 2023 |
| Q1 2023 | 71.3 | -2.62 | -3.55% | Mar 31, 2023 |
| Q4 2022 | 69.4 | -7.34 | -9.57% | Dec 31, 2022 |
| Q3 2022 | 69 | -10.1 | -12.8% | Sep 30, 2022 |
| Q2 2022 | 70.4 | -7.54 | -9.68% | Jun 30, 2022 |
| Q1 2022 | 73.9 | -2.67 | -3.49% | Mar 31, 2022 |
| Q4 2021 | 76.7 | +0.58 | +0.76% | Dec 31, 2021 |
| Q3 2021 | 79.1 | +2.87 | +3.76% | Sep 30, 2021 |
| Q2 2021 | 77.9 | +1.96 | +2.58% | Jun 30, 2021 |
| Q1 2021 | 76.6 | +0.21 | +0.28% | Mar 31, 2021 |
| Q4 2020 | 76.1 | -0.51 | -0.67% | Dec 31, 2020 |
| Q3 2020 | 76.3 | -0.03 | -0.04% | Sep 30, 2020 |
| Q2 2020 | 76 | -1.41 | -1.82% | Jun 30, 2020 |
| Q1 2020 | 76.4 | -2.05 | -2.61% | Mar 31, 2020 |
| Q4 2019 | 76.6 | -2.65 | -3.34% | Dec 31, 2019 |
| Q3 2019 | 76.3 | -3.74 | -4.67% | Sep 30, 2019 |
| Q2 2019 | 77.4 | -2.25 | -2.83% | Jun 30, 2019 |
| Q1 2019 | 78.4 | -2.04 | -2.54% | Mar 31, 2019 |
| Q4 2018 | 79.3 | -2.64 | -3.22% | Dec 31, 2018 |
| Q3 2018 | 80.1 | -1.96 | -2.39% | Sep 30, 2018 |
| Q2 2018 | 79.6 | -3.92 | -4.69% | Jun 30, 2018 |
| Q1 2018 | 80.5 | -2.98 | -3.57% | Mar 31, 2018 |
| Q4 2017 | 81.9 | -1.87 | -2.23% | Dec 31, 2017 |
| Q3 2017 | 82 | -2.96 | -3.48% | Sep 30, 2017 |
| Q2 2017 | 83.5 | -1.25 | -1.47% | Jun 30, 2017 |
| Q1 2017 | 83.4 | -0.83 | -0.99% | Mar 31, 2017 |
| Q4 2016 | 83.8 | -0.01 | -0.01% | Dec 31, 2016 |
| Q3 2016 | 85 | +2.24 | +2.71% | Sep 30, 2016 |
| Q2 2016 | 84.8 | +2 | +2.42% | Jun 30, 2016 |
| Q1 2016 | 84.3 | +1.22 | +1.47% | Mar 31, 2016 |
| Q4 2015 | 83.8 | +1.25 | +1.51% | Dec 31, 2015 |
| Q3 2015 | 82.7 | -0.26 | -0.31% | Sep 30, 2015 |
| Q2 2015 | 82.8 | -0.8 | -0.96% | Jun 30, 2015 |
| Q1 2015 | 83.1 | -0.32 | -0.38% | Mar 31, 2015 |
| Q4 2014 | 82.5 | -0.43 | -0.52% | Dec 31, 2014 |
| Q3 2014 | 83 | -0.65 | -0.78% | Sep 30, 2014 |
| Q2 2014 | 83.6 | -0.38 | -0.45% | Jun 30, 2014 |
| Q1 2014 | 83.4 | -1.05 | -1.24% | Mar 31, 2014 |
| Q4 2013 | 83 | -2.84 | -3.31% | Dec 31, 2013 |
| Q3 2013 | 83.6 | -1.63 | -1.91% | Sep 30, 2013 |
| Q2 2013 | 84 | -1.55 | -1.81% | Jun 30, 2013 |
| Q1 2013 | 84.4 | -2.68 | -3.08% | Mar 31, 2013 |
| Q4 2012 | 85.8 | Dec 31, 2012 | ||
| Q3 2012 | 85.3 | Sep 30, 2012 | ||
| Q2 2012 | 85.5 | Jun 30, 2012 | ||
| Q1 2012 | 87.1 | Mar 31, 2012 |