Line graph with 3 lines and 19 points per line.

Top 4, 8, and 20 firms' share of U.S. grocery store sales, 1993-2011
The 2007-09 recession has dampened rising shares of sales in recent years

Percent of sales
Line 1, Top 4.
Point 1, 1993 is 16.8.
Point 2, 1994 is 16.7.
Point 3, 1995 is 17.1.
Point 4, 1996 is 17.5.
Point 5, 1997 is 19.
Point 6, 1998 is 28.
Point 7, 1999 is 27.6.
Point 8, 2000 is 28.8.
Point 9, 2001 is 31.9.
Point 10, 2002 is 29.8.
Point 11, 2003 is 32.9.
Point 12, 2004 is 33.8.
Point 13, 2005 is 35.5.
Point 14, 2006 is 34.7.
Point 15, 2007 is 37.5.
Point 16, 2008 is 38.1.
Point 17, 2009 is 37.9.
Point 18, 2010 is 38.2.
Point 19, 2011 is 37.3.
Line 2, Top 8.
Point 1, 1993 is 26.5.
Point 2, 1994 is 26.1.
Point 3, 1995 is 27.3.
Point 4, 1996 is 28.7.
Point 5, 1997 is 31.3.
Point 6, 1998 is 39.
Point 7, 1999 is 39.9.
Point 8, 2000 is 42.6.
Point 9, 2001 is 46.8.
Point 10, 2002 is 44.4.
Point 11, 2003 is 47.4.
Point 12, 2004 is 46.7.
Point 13, 2005 is 49.
Point 14, 2006 is 47.8.
Point 15, 2007 is 50.4.
Point 16, 2008 is 50.8.
Point 17, 2009 is 50.9.
Point 18, 2010 is 51.2.
Point 19, 2011 is 50.5.
Line 3, Top 20.
Point 1, 1993 is 39.9.
Point 2, 1994 is 41.1.
Point 3, 1995 is 40.6.
Point 4, 1996 is 42.2.
Point 5, 1997 is 45.9.
Point 6, 1998 is 50.3.
Point 7, 1999 is 54.
Point 8, 2000 is 54.7.
Point 9, 2001 is 58.7.
Point 10, 2002 is 56.2.
Point 11, 2003 is 58.8.
Point 12, 2004 is 58.8.
Point 13, 2005 is 61.6.
Point 14, 2006 is 59.6.
Point 15, 2007 is 63.7.
Point 16, 2008 is 65.1.
Point 17, 2009 is 64.3.
Point 18, 2010 is 64.7.
Point 19, 2011 is 63.7.

Note: Sales based on North American Industry Classification System (NAICS). Source: USDA, ERS calculations using data from U.S. Census Bureau, Monthly Retail Trade Survey, 1992-2012; and company annual reports.