| Period | Value | YoY Chg | Change % | Date | Report | Filed |
|---|---|---|---|---|---|---|
| Q1 2023 | 31.1M | +120K | +0.39% | 16 Feb 2023 | 10-K | 22 Feb 2023 |
| Q3 2022 | 31M | -638K | -2.02% | 01 Nov 2022 | 10-Q | 03 Nov 2022 |
| Q2 2022 | 31M | -641K | -2.02% | 01 Aug 2022 | 10-Q | 04 Aug 2022 |
| Q1 2022 | 31M | -637K | -2.01% | 03 May 2022 | 10-Q | 04 May 2022 |
| Q3 2021 | 31.7M | +78.9K | +0.25% | 02 Nov 2021 | 10-Q | 04 Nov 2021 |
| Q2 2021 | 31.7M | +79.3K | +0.25% | 02 Aug 2021 | 10-Q | 05 Aug 2021 |
| Q1 2021 | 31.7M | +77.5K | +0.25% | 04 May 2021 | 10-Q | 06 May 2021 |
| Q3 2020 | 31.6M | +81.3K | +0.26% | 03 Nov 2020 | 10-Q | 05 Nov 2020 |
| Q2 2020 | 31.6M | +82K | +0.26% | 03 Aug 2020 | 10-Q | 06 Aug 2020 |
| Q1 2020 | 31.6M | +182K | +0.58% | 05 May 2020 | 10-Q | 08 May 2020 |
| Q3 2019 | 31.5M | +137K | +0.44% | 04 Nov 2019 | 10-Q | 07 Nov 2019 |
| Q2 2019 | 31.5M | +175K | +0.56% | 06 Aug 2019 | 10-Q | 08 Aug 2019 |
| Q1 2019 | 31.4M | -1.43M | -4.35% | 25 Feb 2019 | 10-K | 28 Feb 2019 |
| Q3 2018 | 31.4M | +13.1M | +71.6% | 30 Oct 2018 | 10-Q | 01 Nov 2018 |
| Q2 2018 | 31.3M | +13.1M | +71.4% | 30 Jul 2018 | 10-Q | 02 Aug 2018 |
| Q1 2018 | 32.8M | +14.7M | +80.9% | 30 Apr 2018 | 10-Q | 03 May 2018 |
| Q3 2017 | 18.3M | +103K | +0.57% | 01 Nov 2017 | 10-Q | 06 Nov 2017 |
| Q2 2017 | 18.3M | +129K | +0.71% | 31 Jul 2017 | 10-Q | 03 Aug 2017 |
| Q1 2017 | 18.2M | +181K | +1.01% | 06 Mar 2017 | 10-K | 09 Mar 2017 |
| Q3 2016 | 18.2M | +207K | +1.15% | 31 Oct 2016 | 10-Q | 03 Nov 2016 |
| Q2 2016 | 18.2M | +194K | +1.08% | 01 Aug 2016 | 10-Q | 04 Aug 2016 |
| Q1 2016 | 18M | +168K | +0.94% | 29 Feb 2016 | 10-K | 03 Mar 2016 |
| Q3 2015 | 18M | +172K | +0.97% | 02 Nov 2015 | 10-Q | 05 Nov 2015 |
| Q2 2015 | 18M | +170K | +0.96% | 04 Aug 2015 | 10-Q | 06 Aug 2015 |
| Q1 2015 | 17.8M | +190K | +1.08% | 04 Mar 2015 | 10-K | 11 Mar 2015 |
| Q3 2014 | 17.8M | +196K | +1.11% | 06 Nov 2014 | 10-Q | 06 Nov 2014 |
| Q2 2014 | 17.8M | +195K | +1.11% | 30 Jul 2014 | 10-Q | 07 Aug 2014 |
| Q1 2014 | 17.6M | +30.2K | +0.17% | 28 Feb 2014 | 10-K | 06 Mar 2014 |
| Q3 2013 | 17.6M | +6.33K | +0.04% | 01 Nov 2013 | 10-Q | 07 Nov 2013 |
| Q2 2013 | 17.6M | -670K | -3.67% | 01 Aug 2013 | 10-Q | 08 Aug 2013 |
| Q1 2013 | 17.6M | -1.24M | -6.57% | 11 Mar 2013 | 10-K | 18 Mar 2013 |
| Q3 2012 | 17.6M | -1.21M | -6.44% | 05 Nov 2012 | 10-Q | 09 Nov 2012 |
| Q2 2012 | 18.3M | -525K | -2.79% | 02 Aug 2012 | 10-Q | 09 Aug 2012 |
| Q1 2012 | 18.8M | 08 Mar 2012 | 10-K | 15 Mar 2012 | ||
| Q3 2011 | 18.8M | 03 Nov 2011 | 10-Q | 09 Nov 2011 | ||
| Q2 2011 | 18.8M | 04 Aug 2011 | 10-Q | 09 Aug 2011 |