| Period | Value | YoY Chg | Change % | Date |
|---|---|---|---|---|
| Q1 2024 | 40.4 | -0.05 | -0.12% | Mar 31, 2024 |
| Q4 2023 | 41 | 0 | 0% | Dec 31, 2023 |
| Q3 2023 | 39.9 | -1.24 | -3.01% | Sep 30, 2023 |
| Q2 2023 | 39.9 | -1.03 | -2.52% | Jun 30, 2023 |
| Q1 2023 | 40.5 | +0.55 | +1.38% | Mar 31, 2023 |
| Q4 2022 | 41 | +1.57 | +3.98% | Dec 31, 2022 |
| Q3 2022 | 41.1 | +2.47 | +6.39% | Sep 30, 2022 |
| Q2 2022 | 40.9 | +3.04 | +8.03% | Jun 30, 2022 |
| Q1 2022 | 39.9 | +2.07 | +5.47% | Mar 31, 2022 |
| Q4 2021 | 39.5 | +2.76 | +7.52% | Dec 31, 2021 |
| Q3 2021 | 38.7 | +2.26 | +6.21% | Sep 30, 2021 |
| Q2 2021 | 37.9 | +1.8 | +4.99% | Jun 30, 2021 |
| Q1 2021 | 37.9 | +3.62 | +10.6% | Mar 31, 2021 |
| Q4 2020 | 36.7 | +4.9 | +15.4% | Dec 31, 2020 |
| Q3 2020 | 36.4 | +5.1 | +16.3% | Sep 30, 2020 |
| Q2 2020 | 36.1 | +7.58 | +26.6% | Jun 30, 2020 |
| Q1 2020 | 34.2 | +4.42 | +14.8% | Mar 31, 2020 |
| Q4 2019 | 31.8 | -1.4 | -4.22% | Dec 31, 2019 |
| Q3 2019 | 31.3 | -1.76 | -5.32% | Sep 30, 2019 |
| Q2 2019 | 28.5 | -6.42 | -18.4% | Jun 30, 2019 |
| Q1 2019 | 29.8 | -4.16 | -12.2% | Mar 31, 2019 |
| Q4 2018 | 33.2 | +3.31 | +11.1% | Dec 31, 2018 |
| Q3 2018 | 33.1 | +5.29 | +19% | Sep 30, 2018 |
| Q2 2018 | 34.9 | +8.9 | +34.2% | Jun 30, 2018 |
| Q1 2018 | 34 | +7.18 | +26.8% | Mar 31, 2018 |
| Q4 2017 | 29.9 | +4.11 | +15.9% | Dec 31, 2017 |
| Q3 2017 | 27.8 | +1.81 | +6.97% | Sep 30, 2017 |
| Q2 2017 | 26 | +1.53 | +6.25% | Jun 30, 2017 |
| Q1 2017 | 26.8 | +1.98 | +7.98% | Mar 31, 2017 |
| Q4 2016 | 25.8 | -0.84 | -3.16% | Dec 31, 2016 |
| Q3 2016 | 26 | +0.8 | +3.18% | Sep 30, 2016 |
| Q2 2016 | 24.5 | -2.38 | -8.86% | Jun 30, 2016 |
| Q1 2016 | 24.8 | -1.05 | -4.06% | Mar 31, 2016 |
| Q4 2015 | 26.6 | +1.22 | +4.8% | Dec 31, 2015 |
| Q3 2015 | 25.2 | +0.86 | +3.54% | Sep 30, 2015 |
| Q2 2015 | 26.9 | +3.08 | +13% | Jun 30, 2015 |
| Q1 2015 | 25.9 | +2.52 | +10.8% | Mar 31, 2015 |
| Q4 2014 | 25.4 | +4.5 | +21.5% | Dec 31, 2014 |
| Q3 2014 | 24.3 | +0.47 | +1.97% | Sep 30, 2014 |
| Q2 2014 | 23.8 | -1.54 | -6.08% | Jun 30, 2014 |
| Q1 2014 | 23.4 | +0.91 | +4.06% | Mar 31, 2014 |
| Q4 2013 | 20.9 | +3.19 | +18% | Dec 31, 2013 |
| Q3 2013 | 23.8 | +11.2 | +88.6% | Sep 30, 2013 |
| Q2 2013 | 25.3 | +13.7 | +118% | Jun 30, 2013 |
| Q1 2013 | 22.4 | +9.43 | +72.5% | Mar 31, 2013 |
| Q4 2012 | 17.7 | +1.09 | +6.56% | Dec 31, 2012 |
| Q3 2012 | 12.6 | -9.61 | -43.2% | Sep 30, 2012 |
| Q2 2012 | 11.6 | -15.4 | -57% | Jun 30, 2012 |
| Q1 2012 | 13 | -18.5 | -58.7% | Mar 31, 2012 |
| Q4 2011 | 16.6 | -21.1 | -56% | Dec 31, 2011 |
| Q3 2011 | 22.3 | Sep 30, 2011 | ||
| Q2 2011 | 27 | Jun 30, 2011 | ||
| Q1 2011 | 31.5 | Mar 31, 2011 | ||
| Q4 2010 | 37.8 | Dec 31, 2010 |