| Expansion Date | Stock Number in Treatment Group | Stock Number in Control Group | Sample Period |
First Expansion | Dec. 5, 2011 | 192 | 240 | Dec. 4, 2010-Dec. 4, 2012 |
Second Expansion | Jan. 31, 2013 | 261 | 172 | Jul. 4, 2012-Aug. 31, 2013 |
Third Expansion | Sep. 16, 2013 | 172 | 180 | Feb. 1, 2013-Apr. 30, 2014 |