| Period | Value | YoY Chg | Change % | Date |
|---|---|---|---|---|
| Q1 2024 | 36 | -0.91 | -2.47% | Mar 31, 2024 |
| Q4 2023 | 36.5 | -0.04 | -0.11% | Dec 31, 2023 |
| Q3 2023 | 36.7 | -0.25 | -0.68% | Sep 30, 2023 |
| Q2 2023 | 36.7 | -0.57 | -1.53% | Jun 30, 2023 |
| Q1 2023 | 36.9 | -0.7 | -1.86% | Mar 31, 2023 |
| Q4 2022 | 36.6 | -1.77 | -4.62% | Dec 31, 2022 |
| Q3 2022 | 36.9 | -0.98 | -2.58% | Sep 30, 2022 |
| Q2 2022 | 37.3 | -0.67 | -1.77% | Jun 30, 2022 |
| Q1 2022 | 37.6 | -0.56 | -1.47% | Mar 31, 2022 |
| Q4 2021 | 38.3 | +1.31 | +3.54% | Dec 31, 2021 |
| Q3 2021 | 37.9 | +0.8 | +2.16% | Sep 30, 2021 |
| Q2 2021 | 38 | +0.8 | +2.15% | Jun 30, 2021 |
| Q1 2021 | 38.2 | +0.92 | +2.47% | Mar 31, 2021 |
| Q4 2020 | 37 | -1.37 | -3.57% | Dec 31, 2020 |
| Q3 2020 | 37.1 | -1.77 | -4.55% | Sep 30, 2020 |
| Q2 2020 | 37.2 | -3.05 | -7.58% | Jun 30, 2020 |
| Q1 2020 | 37.2 | -3.95 | -9.59% | Mar 31, 2020 |
| Q4 2019 | 38.4 | -4.53 | -10.6% | Dec 31, 2019 |
| Q3 2019 | 38.9 | -5.22 | -11.8% | Sep 30, 2019 |
| Q2 2019 | 40.2 | -3.9 | -8.84% | Jun 30, 2019 |
| Q1 2019 | 41.2 | -3.53 | -7.9% | Mar 31, 2019 |
| Q4 2018 | 42.9 | -1.44 | -3.25% | Dec 31, 2018 |
| Q3 2018 | 44.1 | -0.15 | -0.34% | Sep 30, 2018 |
| Q2 2018 | 44.1 | -0.09 | -0.2% | Jun 30, 2018 |
| Q1 2018 | 44.7 | +0.9 | +2.05% | Mar 31, 2018 |
| Q4 2017 | 44.3 | +0.45 | +1.03% | Dec 31, 2017 |
| Q3 2017 | 44.3 | +0.26 | +0.59% | Sep 30, 2017 |
| Q2 2017 | 44.2 | -0.51 | -1.14% | Jun 30, 2017 |
| Q1 2017 | 43.8 | -1.39 | -3.08% | Mar 31, 2017 |
| Q4 2016 | 43.9 | -1.85 | -4.04% | Dec 31, 2016 |
| Q3 2016 | 44 | -3.21 | -6.8% | Sep 30, 2016 |
| Q2 2016 | 44.7 | -3.62 | -7.49% | Jun 30, 2016 |
| Q1 2016 | 45.2 | -4.6 | -9.24% | Mar 31, 2016 |
| Q4 2015 | 45.8 | -5.23 | -10.3% | Dec 31, 2015 |
| Q3 2015 | 47.2 | -4.52 | -8.74% | Sep 30, 2015 |
| Q2 2015 | 48.3 | -2.81 | -5.49% | Jun 30, 2015 |
| Q1 2015 | 49.8 | -0.45 | -0.9% | Mar 31, 2015 |
| Q4 2014 | 51 | +1.79 | +3.64% | Dec 31, 2014 |
| Q3 2014 | 51.8 | +3.5 | +7.25% | Sep 30, 2014 |
| Q2 2014 | 51.2 | +2.42 | +4.97% | Jun 30, 2014 |
| Q1 2014 | 50.3 | +0.91 | +1.84% | Mar 31, 2014 |
| Q4 2013 | 49.2 | -0.71 | -1.42% | Dec 31, 2013 |
| Q3 2013 | 48.3 | -1.49 | -3% | Sep 30, 2013 |
| Q2 2013 | 48.7 | -1.07 | -2.15% | Jun 30, 2013 |
| Q1 2013 | 49.3 | -0.88 | -1.75% | Mar 31, 2013 |
| Q4 2012 | 49.9 | -1.1 | -2.16% | Dec 31, 2012 |
| Q3 2012 | 49.7 | -2.41 | -4.62% | Sep 30, 2012 |
| Q2 2012 | 49.8 | -3.37 | -6.34% | Jun 30, 2012 |
| Q1 2012 | 50.2 | -3.5 | -6.52% | Mar 31, 2012 |
| Q4 2011 | 51 | -2.9 | -5.38% | Dec 31, 2011 |
| Q3 2011 | 52.1 | Sep 30, 2011 | ||
| Q2 2011 | 53.2 | Jun 30, 2011 | ||
| Q1 2011 | 53.7 | Mar 31, 2011 | ||
| Q4 2010 | 53.9 | Dec 31, 2010 |