Line graph with 2 lines and 37 points per line.

Percent change in the annual Consumer Price Index (CPI) for food and prices for field crops, 1976-2012
Commodity (field crop) prices are about 10 times more volatile than retail food prices over time

Percent
Line 1, Field crop prices.
Point 1, 1975-76 is No data.
Point 2, 1976-77 is -0.49620143.
Point 3, 1977-78 is -10.828173.
Point 4, 1978-79 is 16.556498.
Point 5, 1979-80 is 7.6778665.
Point 6, 1980-81 is 16.471123.
Point 7, 1981-82 is -16.293198.
Point 8, 1982-83 is 3.0056107.
Point 9, 1983-84 is 15.695727.
Point 10, 1984-85 is -17.892828.
Point 11, 1985-86 is -13.716155.
Point 12, 1986-87 is -20.542263.
Point 13, 1987-88 is 25.498606.
Point 14, 1988-89 is 26.72845.
Point 15, 1989-90 is -11.264077.
Point 16, 1990-91 is -7.1559906.
Point 17, 1991-92 is 1.3463947.
Point 18, 1992-93 is -0.92797315.
Point 19, 1993-94 is 11.10471.
Point 20, 1994-95 is -6.1312604.
Point 21, 1995-96 is 31.683668.
Point 22, 1996-97 is -4.9106402.
Point 23, 1997-98 is -13.639642.
Point 24, 1998-99 is -21.691683.
Point 25, 1999-00 is -6.3867183.
Point 26, 2000-01 is 2.3799584.
Point 27, 2001-02 is 2.7691438.
Point 28, 2002-03 is 18.649069.
Point 29, 2003-04 is 13.097678.
Point 30, 2004-05 is -15.006603.
Point 31, 2005-06 is -0.27795282.
Point 32, 2006-07 is 26.498125.
Point 33, 2007-08 is 49.567352.
Point 34, 2008-09 is -1.3587257.
Point 35, 2009-10 is -11.31629.
Point 36, 2010-11 is 30.934443.
Point 37, 2011-12 is 19.264416.
Line 2, Food CPI.
Point 1, 1975-76 is 3.
Point 2, 1976-77 is 6.3.
Point 3, 1977-78 is 9.9.
Point 4, 1978-79 is 11.
Point 5, 1979-80 is 8.6.
Point 6, 1980-81 is 7.8.
Point 7, 1981-82 is 4.1.
Point 8, 1982-83 is 2.1.
Point 9, 1983-84 is 3.8.
Point 10, 1984-85 is 2.3.
Point 11, 1985-86 is 3.2.
Point 12, 1986-87 is 4.1.
Point 13, 1987-88 is 4.1.
Point 14, 1988-89 is 5.8.
Point 15, 1989-90 is 5.8.
Point 16, 1990-91 is 2.9.
Point 17, 1991-92 is 1.2.
Point 18, 1992-93 is 2.2.
Point 19, 1993-94 is 2.4.
Point 20, 1994-95 is 2.8.
Point 21, 1995-96 is 3.3.
Point 22, 1996-97 is 2.6.
Point 23, 1997-98 is 2.2.
Point 24, 1998-99 is 2.1.
Point 25, 1999-00 is 2.3.
Point 26, 2000-01 is 3.2.
Point 27, 2001-02 is 1.8.
Point 28, 2002-03 is 2.2.
Point 29, 2003-04 is 3.4.
Point 30, 2004-05 is 2.4.
Point 31, 2005-06 is 2.4.
Point 32, 2006-07 is 4.
Point 33, 2007-08 is 5.5.
Point 34, 2008-09 is 1.8.
Point 35, 2009-10 is 0.8.
Point 36, 2010-11 is 3.7.
Point 37, 2011-12 is 2.6.

Field crop prices are represented by the production-weighted average farm price of corn, wheat, and soybeans in the U.S.

Source: Calculated by ERS, USDA based on Bureau of Labor Statistics (BLS) and National Agricultural Statistics Service (NASS) data.