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| Company | Unit |
| CVS Health | |
| Walgreens Boots |
| 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 |
| ... | ... | ... | ... | ... | ... | ... | 0.837 | 0.641 | 0.623 | 0.595 | 0.489 | |||||||||||||||
| 0.419 | 1.66 | 0.557 | 0.888 | 0.423 |
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