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$ 22.78
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36.54 -22.78= 13.76
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42.27-36.54= 5.73 2010 -2009 42.27 -22.78= 19.49 2010 -2008
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31.08 - 42.27 = -11.19 (2011- 2010) 31.08 -36.54 = -5.46 (2011- 2009)
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2012-2011
41.20 - 31.08 = 10.12 2012 - 2010
41.20 - 42.27= -1.07