| Period | Value | YoY Chg | Change % | Start Date | End Date |
|---|---|---|---|---|---|
| Q1 2024 | 29 | +5.22 | +22% | Mar 31, 2024 | |
| Q4 2023 | 28.3 | +5.98 | +26.9% | Dec 31, 2023 | |
| Q3 2023 | 27.6 | +5.13 | +22.9% | Sep 30, 2023 | |
| Q2 2023 | 26.5 | +4.28 | +19.3% | Jun 30, 2023 | |
| Q1 2023 | 23.8 | +0.68 | +2.95% | Mar 31, 2023 | |
| Q4 2022 | 22.3 | -0.76 | -3.3% | Dec 31, 2022 | |
| Q3 2022 | 22.4 | -0.56 | -2.44% | Sep 30, 2022 | |
| Q2 2022 | 22.2 | -1.61 | -6.76% | Jun 30, 2022 | |
| Q1 2022 | 23.1 | -1.87 | -7.5% | Mar 31, 2022 | |
| Q4 2021 | 23 | -2.76 | -10.7% | Dec 31, 2021 | |
| Q3 2021 | 23 | -1.82 | -7.34% | Sep 30, 2021 | |
| Q2 2021 | 23.8 | +1.25 | +5.54% | Jun 30, 2021 | |
| Q1 2021 | 24.9 | +2.82 | +12.7% | Mar 31, 2021 | |
| Q4 2020 | 25.8 | +3.86 | +17.6% | Dec 31, 2020 | |
| Q3 2020 | 24.8 | +3.11 | +14.3% | Sep 30, 2020 | |
| Q2 2020 | 22.6 | +0.63 | +2.87% | Jun 30, 2020 | |
| Q1 2020 | 22.1 | +0.88 | +4.14% | Mar 31, 2020 | |
| Q4 2019 | 21.9 | +1.3 | +6.31% | Dec 31, 2019 | |
| Q3 2019 | 21.7 | +1.26 | +6.17% | Sep 30, 2019 | |
| Q2 2019 | 21.9 | +1.58 | +7.76% | Jun 30, 2019 | |
| Q1 2019 | 21.2 | +0.68 | +3.31% | Mar 31, 2019 | |
| Q4 2018 | 20.6 | -0.16 | -0.77% | Dec 31, 2018 | |
| Q3 2018 | 20.4 | +0.51 | +2.56% | Sep 30, 2018 | |
| Q2 2018 | 20.4 | -0.36 | -1.74% | Jun 30, 2018 | |
| Q1 2018 | 20.6 | -1.05 | -4.86% | Mar 31, 2018 | |
| Q4 2017 | 20.8 | -1.22 | -5.55% | Dec 31, 2017 | |
| Q3 2017 | 19.9 | -4.29 | -17.7% | Sep 30, 2017 | |
| Q2 2017 | 20.7 | -3.11 | -13.1% | Jun 30, 2017 | |
| Q1 2017 | 21.6 | -2.12 | -8.94% | Mar 31, 2017 | |
| Q4 2016 | 22 | -1.96 | -8.18% | Dec 31, 2016 | |
| Q3 2016 | 24.2 | +1.39 | +6.09% | Sep 30, 2016 | |
| Q2 2016 | 23.8 | +1.92 | +8.76% | Jun 30, 2016 | |
| Q1 2016 | 23.7 | +3.06 | +14.8% | Mar 31, 2016 | |
| Q4 2015 | 24 | +3.75 | +18.6% | Dec 31, 2015 | |
| Q3 2015 | 22.8 | +2.84 | +14.2% | Sep 30, 2015 | |
| Q2 2015 | 21.9 | +1.71 | +8.47% | Jun 30, 2015 | |
| Q1 2015 | 20.7 | -0.11 | -0.53% | Mar 31, 2015 | |
| Q4 2014 | 20.2 | -0.12 | -0.59% | Dec 31, 2014 | |
| Q3 2014 | 20 | -0.01 | -0.05% | Sep 30, 2014 | |
| Q2 2014 | 20.2 | -0.26 | -1.27% | Jun 30, 2014 | |
| Q1 2014 | 20.8 | +0.38 | +1.86% | Mar 31, 2014 | |
| Q4 2013 | 20.3 | -0.63 | -3.01% | Dec 31, 2013 | |
| Q3 2013 | 20 | -0.64 | -3.11% | Sep 30, 2013 | |
| Q2 2013 | 20.5 | +0.77 | +3.91% | Jun 30, 2013 | |
| Q1 2013 | 20.4 | +1.01 | +5.21% | Mar 31, 2013 | |
| Q4 2012 | 21 | +2.27 | +12.1% | Dec 31, 2012 | |
| Q3 2012 | 20.6 | +1.3 | +6.73% | Sep 30, 2012 | |
| Q2 2012 | 19.7 | -0.53 | -2.62% | Jun 30, 2012 | |
| Q1 2012 | 19.4 | -1.26 | -6.11% | Mar 31, 2012 | |
| Q4 2011 | 18.7 | -2.89 | -13.4% | Dec 31, 2011 | |
| Q3 2011 | 19.3 | Sep 30, 2011 | |||
| Q2 2011 | 20.2 | Jun 30, 2011 | |||
| Q1 2011 | 20.6 | Mar 31, 2011 | |||
| Q4 2010 | 21.6 | Dec 31, 2010 |