| Report Date | Net Change During Quarter |
|---|---|
| March 31, 2010 | -78 |
| June 30, 2010 | -104 |
| September 30, 2010 | -69 |
| December 31, 2010 | -103 |
| March 31, 2011 | -84 |
| June 30, 2011 | -61 |
| September 30, 2011 | -76 |
| December 31, 2011 | -80 |
| March 31, 2012 | -49 |
| June 30, 2012 | -63 |
| September 30, 2012 | -64 |
| December 31, 2012 | -98 |
| March 31, 2013 | -64 |
| June 30, 2013 | -79 |
| September 30, 2013 | -49 |
| December 31, 2013 | -79 |
| March 31, 2014 | -82 |
| June 30, 2014 | -74 |
| September 30, 2014 | -67 |
| December 31, 2014 | -80 |
| March 31, 2015 | -90 |
| June 30, 2015 | -71 |
| September 30, 2015 | -78 |
| December 31, 2015 | -88 |
| March 30, 2016 | -60 |
| June 30, 2016 | -64 |
| September 30, 2016 | -78 |
| December 31, 2016 | -67 |
| March 31, 2017 | -57 |
| June 30, 2017 | -69 |
| September 30, 2017 | -50 |
| December 31, 2017 | -68 |
| March 31, 2018 | -63 |
| June 30, 2018 | -65 |
| September 30, 2018 | -65 |
| December 31, 2018 | -71 |
| March 31, 2019 | -44 |
| June 30, 2019 | -59 |
| September 30, 2019 | -47 |
| December 31, 2019 | -81 |
| March 31, 2020 | -61 |
Last Updated: February 3, 2022