how many more long future notional contracts mature by 2012 than short futures?
Important information:
text_4: notional contract volumes by year of maturity derivative instrument 2012 .
table_4: derivative instrument the futures 2013 long of notional contract volumes by year of maturity 2012 is 38201 ;
table_5: derivative instrument the futures 2013 short of notional contract volumes by year of maturity 2012 is 36637 ;
Reasoning Steps:
Step: minus1-1(38201, 36637) = 1564
Program:
subtract(38201, 36637)
Program (Nested):
subtract(38201, 36637)

Please answer the following financial question based on the context provided. Make sure to give the answer in raw number, not in percentage and without any units. If the question asks for percentage the value should be less than 1
Context:
table of contents valero energy corporation and subsidiaries notes to consolidated financial statements ( continued ) cash flow hedges cash flow hedges are used to hedge price volatility in certain forecasted feedstock and refined product purchases , refined product sales , and natural gas purchases . the objective of our cash flow hedges is to lock in the price of forecasted feedstock , product or natural gas purchases or refined product sales at existing market prices that we deem favorable . as of december 31 , 2011 , we had the following outstanding commodity derivative instruments that were entered into to hedge forecasted purchases or sales of crude oil and refined products . the information presents the notional volume of outstanding contracts by type of instrument and year of maturity ( volumes in thousands of barrels ) . notional contract volumes by year of maturity derivative instrument 2012 .
Table
derivative instrument           | notional contract volumes by year of maturity 2012
crude oil and refined products: |                                                   
swaps 2013 long                 | 5961                                              
swaps 2013 short                | 5961                                              
futures 2013 long               | 38201                                             
futures 2013 short              | 36637                                             
physical contracts 2013 short   | 1564                                              
.
Question: 
how many more long future notional contracts mature by 2012 than short futures?
Important information:
text_4: notional contract volumes by year of maturity derivative instrument 2012 .
table_4: derivative instrument the futures 2013 long of notional contract volumes by year of maturity 2012 is 38201 ;
table_5: derivative instrument the futures 2013 short of notional contract volumes by year of maturity 2012 is 36637 ;
Reasoning Steps:
Step: minus1-1(38201, 36637) = 1564
Program:
subtract(38201, 36637)
Program (Nested):
subtract(38201, 36637)
