| Period | Value | YoY Chg | Change % | Date |
|---|---|---|---|---|
| Q1 2024 | 60.3 | -9.47 | -13.6% | Mar 31, 2024 |
| Q4 2023 | 63.4 | -6.06 | -8.72% | Dec 31, 2023 |
| Q3 2023 | 68.5 | +0.3 | +0.44% | Sep 30, 2023 |
| Q2 2023 | 70.7 | +3.5 | +5.21% | Jun 30, 2023 |
| Q1 2023 | 69.8 | +2.15 | +3.18% | Mar 31, 2023 |
| Q4 2022 | 69.5 | -0.06 | -0.09% | Dec 31, 2022 |
| Q3 2022 | 68.2 | -4.33 | -5.97% | Sep 30, 2022 |
| Q2 2022 | 67.2 | -9.85 | -12.8% | Jun 30, 2022 |
| Q1 2022 | 67.7 | -3.48 | -4.89% | Mar 31, 2022 |
| Q4 2021 | 69.5 | -2.43 | -3.38% | Dec 31, 2021 |
| Q3 2021 | 72.5 | +3.95 | +5.76% | Sep 30, 2021 |
| Q2 2021 | 77 | +10 | +15% | Jun 30, 2021 |
| Q1 2021 | 71.1 | +1.3 | +1.86% | Mar 31, 2021 |
| Q4 2020 | 72 | +2.98 | +4.32% | Dec 31, 2020 |
| Q3 2020 | 68.6 | -2.78 | -3.9% | Sep 30, 2020 |
| Q2 2020 | 67 | -6.53 | -8.88% | Jun 30, 2020 |
| Q1 2020 | 69.8 | -2.43 | -3.36% | Mar 31, 2020 |
| Q4 2019 | 69 | -3.48 | -4.8% | Dec 31, 2019 |
| Q3 2019 | 71.3 | +4.12 | +6.13% | Sep 30, 2019 |
| Q2 2019 | 73.5 | +9.24 | +14.4% | Jun 30, 2019 |
| Q1 2019 | 72.3 | +9.83 | +15.7% | Mar 31, 2019 |
| Q4 2018 | 72.5 | +12.8 | +21.4% | Dec 31, 2018 |
| Q3 2018 | 67.2 | +2.16 | +3.32% | Sep 30, 2018 |
| Q2 2018 | 64.3 | -5.18 | -7.46% | Jun 30, 2018 |
| Q1 2018 | 62.5 | -14.7 | -19% | Mar 31, 2018 |
| Q4 2017 | 59.7 | -23.8 | -28.5% | Dec 31, 2017 |
| Q3 2017 | 65.1 | -14.8 | -18.5% | Sep 30, 2017 |
| Q2 2017 | 69.5 | -9.29 | -11.8% | Jun 30, 2017 |
| Q1 2017 | 77.1 | +7.19 | +10.3% | Mar 31, 2017 |
| Q4 2016 | 83.5 | +15.9 | +23.5% | Dec 31, 2016 |
| Q3 2016 | 79.8 | +13 | +19.4% | Sep 30, 2016 |
| Q2 2016 | 78.8 | +11.2 | +16.5% | Jun 30, 2016 |
| Q1 2016 | 69.9 | -5.06 | -6.75% | Mar 31, 2016 |
| Q4 2015 | 67.6 | -6.12 | -8.3% | Dec 31, 2015 |
| Q3 2015 | 66.8 | -9.11 | -12% | Sep 30, 2015 |
| Q2 2015 | 67.6 | -12.8 | -15.9% | Jun 30, 2015 |
| Q1 2015 | 75 | -4.26 | -5.37% | Mar 31, 2015 |
| Q4 2014 | 73.7 | -8.92 | -10.8% | Dec 31, 2014 |
| Q3 2014 | 75.9 | -10.4 | -12% | Sep 30, 2014 |
| Q2 2014 | 80.4 | +0.04 | +0.05% | Jun 30, 2014 |
| Q1 2014 | 79.3 | +1.97 | +2.55% | Mar 31, 2014 |
| Q4 2013 | 82.6 | +6.7 | +8.82% | Dec 31, 2013 |
| Q3 2013 | 86.3 | +15.9 | +22.5% | Sep 30, 2013 |
| Q2 2013 | 80.4 | +10.6 | +15.2% | Jun 30, 2013 |
| Q1 2013 | 77.3 | +7.94 | +11.4% | Mar 31, 2013 |
| Q4 2012 | 75.9 | +11.1 | +17.2% | Dec 31, 2012 |
| Q3 2012 | 70.5 | +11.9 | +20.3% | Sep 30, 2012 |
| Q2 2012 | 69.8 | +15.1 | +27.5% | Jun 30, 2012 |
| Q1 2012 | 69.4 | +18.8 | +37.2% | Mar 31, 2012 |
| Q4 2011 | 64.8 | Dec 31, 2011 | ||
| Q3 2011 | 58.6 | Sep 30, 2011 | ||
| Q2 2011 | 54.7 | Jun 30, 2011 | ||
| Q1 2011 | 50.6 | Mar 31, 2011 |