| Period | Value | YoY Chg | Change % | Date | Report | Filed |
|---|---|---|---|---|---|---|
| Q1 2024 | 21.4M | -663K | -3.01% | Mar 31, 2024 | 10-Q | 2024-05-10 |
| Q4 2023 | 21.5M | -627K | -2.84% | Jan 25, 2024 | 10-K | 2024-02-09 |
| Q1 2023 | 22M | -660K | -2.91% | Mar 31, 2023 | 10-Q | 2023-05-05 |
| Q4 2022 | 22.1M | -699K | -3.07% | Jan 26, 2023 | 10-K | 2023-02-10 |
| Q3 2022 | 22.3M | -691K | -3.01% | Sep 30, 2022 | 10-Q | 2022-11-04 |
| Q2 2022 | 22.5M | -610K | -2.64% | Jun 30, 2022 | 10-Q | 2022-07-29 |
| Q1 2022 | 22.7M | -589K | -2.53% | Mar 31, 2022 | 10-Q | 2022-05-06 |
| Q4 2021 | 22.8M | -602K | -2.57% | Jan 27, 2022 | 10-K | 2022-02-11 |
| Q3 2021 | 23M | -809K | -3.4% | Sep 30, 2021 | 10-Q | 2021-11-05 |
| Q2 2021 | 23.1M | -854K | -3.56% | Jun 30, 2021 | 10-Q | 2021-07-30 |
| Q1 2021 | 23.3M | -638K | -2.67% | Mar 31, 2021 | 10-Q | 2021-05-07 |
| Q4 2020 | 23.4M | -645K | -2.68% | Jan 25, 2021 | 10-K | 2021-02-08 |
| Q3 2020 | 23.8M | -560K | -2.3% | Sep 30, 2020 | 10-Q | 2020-11-06 |
| Q2 2020 | 24M | -638K | -2.59% | Jun 30, 2020 | 10-Q | 2020-07-31 |
| Q1 2020 | 23.9M | -896K | -3.61% | Mar 31, 2020 | 10-Q | 2020-05-08 |
| Q4 2019 | 24.1M | -742K | -2.99% | Jan 31, 2020 | 10-K | 2020-02-07 |
| Q3 2019 | 24.4M | -691K | -2.76% | Sep 30, 2019 | 10-Q | 2019-11-08 |
| Q2 2019 | 24.6M | -605K | -2.4% | Jun 30, 2019 | 10-Q | 2019-08-02 |
| Q1 2019 | 24.8M | -590K | -2.32% | Mar 31, 2019 | 10-Q | 2019-05-10 |
| Q4 2018 | 24.8M | -678K | -2.66% | Feb 1, 2019 | 10-K | 2019-02-08 |
| Q3 2018 | 25M | -534K | -2.09% | Sep 30, 2018 | 10-Q | 2018-11-09 |
| Q2 2018 | 25.2M | -454K | -1.77% | Jun 30, 2018 | 10-Q | 2018-07-27 |
| Q1 2018 | 25.4M | -429K | -1.66% | Mar 31, 2018 | 10-Q | 2018-05-04 |
| Q4 2017 | 25.5M | -467K | -1.8% | Feb 5, 2018 | 10-K | 2018-02-09 |
| Q3 2017 | 25.6M | -656K | -2.5% | Sep 30, 2017 | 10-Q | 2017-11-03 |
| Q2 2017 | 25.7M | -822K | -3.1% | Jun 30, 2017 | 10-Q | 2017-07-28 |
| Q1 2017 | 25.8M | -937K | -3.5% | Mar 31, 2017 | 10-Q | 2017-05-05 |
| Q4 2016 | 25.9M | -1.04M | -3.86% | Jan 30, 2017 | 10-K | 2017-02-02 |
| Q3 2016 | 26.2M | -1.12M | -4.1% | Sep 30, 2016 | 10-Q | 2016-11-04 |
| Q2 2016 | 26.5M | -1.21M | -4.37% | Jun 30, 2016 | 10-Q | 2016-07-29 |
| Q1 2016 | 26.8M | -1.21M | -4.32% | Mar 31, 2016 | 10-Q | 2016-05-06 |
| Q4 2015 | 27M | -1.15M | -4.08% | Jan 29, 2016 | 10-K | 2016-02-04 |
| Q3 2015 | 27.4M | -1.19M | -4.17% | Sep 30, 2015 | 10-Q | 2015-11-06 |
| Q2 2015 | 27.7M | -1.19M | -4.11% | Jun 30, 2015 | 10-Q | 2015-07-31 |
| Q1 2015 | 28M | -1.25M | -4.29% | Mar 31, 2015 | 10-Q | 2015-05-08 |
| Q4 2014 | 28.1M | -1.26M | -4.3% | Jan 30, 2015 | 10-K | 2015-02-06 |
| Q3 2014 | 28.5M | -1.14M | -3.84% | Sep 30, 2014 | 10-Q | 2014-11-07 |
| Q2 2014 | 28.9M | -1.06M | -3.53% | Jun 30, 2014 | 10-Q | 2014-07-25 |
| Q1 2014 | 29.2M | -966K | -3.2% | Mar 31, 2014 | 10-Q | 2014-05-09 |
| Q4 2013 | 29.4M | -916K | -3.02% | Jan 31, 2014 | 10-K | 2014-02-07 |
| Q3 2013 | 29.7M | -958K | -3.13% | Sep 30, 2013 | 10-Q | 2013-11-08 |
| Q2 2013 | 29.9M | -1.08M | -3.48% | Jun 30, 2013 | 10-Q | 2013-07-26 |
| Q1 2013 | 30.2M | -1.26M | -4.01% | Mar 31, 2013 | 10-Q | 2013-05-03 |
| Q4 2012 | 30.3M | -1.18M | -3.75% | Jan 31, 2013 | 10-K | 2013-02-08 |
| Q3 2012 | 30.6M | -940K | -2.98% | Sep 30, 2012 | 10-Q | 2012-11-02 |
| Q2 2012 | 31M | -858K | -2.69% | Jun 30, 2012 | 10-Q | 2012-07-27 |
| Q1 2012 | 31.4M | -695K | -2.16% | Mar 31, 2012 | 10-Q | 2012-05-04 |
| Q4 2011 | 31.5M | -833K | -2.58% | Feb 1, 2012 | 10-K | 2012-02-13 |
| Q3 2011 | 31.6M | -1.24M | -3.78% | Sep 30, 2011 | 10-Q | 2011-11-04 |
| Q2 2011 | 31.9M | -1.52M | -4.56% | Jun 30, 2011 | 10-Q | 2011-08-01 |
| Q1 2011 | 32.1M | Mar 31, 2011 | 10-Q | 2011-05-05 | ||
| Q4 2010 | 32.3M | Feb 1, 2011 | 10-K | 2011-02-16 | ||
| Q3 2010 | 32.8M | Sep 30, 2010 | 10-Q | 2010-11-05 | ||
| Q2 2010 | 33.4M | Jun 30, 2010 | 10-Q | 2010-07-23 |