how to predict fuel prices based on historical data? For example, I have the fuel prices historical data from 2007 to 2011. How can I predict the fuel prices for 2012?

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% Est. Consumption Hedged: current quarter % Hedged-Crude Oil (WTI) 2007Q1 % Hedged-Heating Oil 67% % Hedged-Jet Fuel Millions of Gallons Hedged (in current quarter) % Not Hedged Jet Fuel ($ per gal.) 72 33% 2.02 2007Q2 2007Q3 11% 11% 42% 11% 73 36% 2.09 40% 60 49% 2.29 2007Q4 47% 053 53% 2.67 2008Q1 35% 41 65% 3.06 2008Q2 46% 54 54% 4.02 2 2008Q3 46% 53 54% 3.02 2008Q4 40% 43 60% 1.32 2009Q1 9% 10 91% 1.34 2009Q2 9% 10 91% 1.79 2009Q3 9% 10 91% 1.79 2009Q4 9% missing data 91% 2.09 2010Q1 15% 5% 44% 76 36% 2.19 2010Q2 18% 5% 19% 52 58% 1.99 2010Q3 18% 5% 19% missing data 58% 2.24 201004 19% 24% 54 57% 2.53 2011Q1 29% 5% 3% 44 63% 3.16 2011Q2 36% 5% 2% 57 57% 3.00 201103 32% 9% 7% 67 52% 2.84 2011Q4 21% 10% 14% 60 55% 2.92 2012Q1* 7% 7% 9% 31 (est.) 77% 2012Q2* 6% 7% 9% 31 (est.) 78% 2012Q3* 4% 6% 8% 31 (est.) 82% 201204* *Information as of 2011Q4, at which time the hedging programs for 2012 were still not fully in place. Notes: % Hedged" is the percentage of fuel consumption hedged using derivatives for the current quarter as reported in each quarter.