{"pre_text": ["the following is a schedule of future minimum rental payments required under long-term operating leases at october 30 , 2010 : fiscal years operating leases ."], "post_text": ["12 .", "commitments and contingencies from time to time in the ordinary course of the company 2019s business , various claims , charges and litigation are asserted or commenced against the company arising from , or related to , contractual matters , patents , trademarks , personal injury , environmental matters , product liability , insurance coverage and personnel and employment disputes .", "as to such claims and litigation , the company can give no assurance that it will prevail .", "the company does not believe that any current legal matters will have a material adverse effect on the company 2019s financial position , results of operations or cash flows .", "13 .", "retirement plans the company and its subsidiaries have various savings and retirement plans covering substantially all employees .", "the company maintains a defined contribution plan for the benefit of its eligible u.s .", "employees .", "this plan provides for company contributions of up to 5% ( 5 % ) of each participant 2019s total eligible compensation .", "in addition , the company contributes an amount equal to each participant 2019s pre-tax contribution , if any , up to a maximum of 3% ( 3 % ) of each participant 2019s total eligible compensation .", "the total expense related to the defined contribution plan for u.s .", "employees was $ 20.5 million in fiscal 2010 , $ 21.5 million in fiscal 2009 and $ 22.6 million in fiscal 2008 .", "the company also has various defined benefit pension and other retirement plans for certain non-u.s .", "employees that are consistent with local statutory requirements and practices .", "the total expense related to the various defined benefit pension and other retirement plans for certain non-u.s .", "employees was $ 11.7 million in fiscal 2010 , $ 10.9 million in fiscal 2009 and $ 13.9 million in fiscal 2008 .", "during fiscal 2009 , the measurement date of the plan 2019s funded status was changed from september 30 to the company 2019s fiscal year end .", "non-u.s .", "plan disclosures the company 2019s funding policy for its foreign defined benefit pension plans is consistent with the local requirements of each country .", "the plans 2019 assets consist primarily of u.s .", "and non-u.s .", "equity securities , bonds , property and cash .", "the benefit obligations and related assets under these plans have been measured at october 30 , 2010 and october 31 , 2009 .", "analog devices , inc .", "notes to consolidated financial statements 2014 ( continued ) ."], "table": [["fiscal years", "operating leases"], ["2011", "$ 21871"], ["2012", "12322"], ["2013", "9078"], ["2014", "6381"], ["2015", "5422"], ["later years", "30655"], ["total", "$ 85729"]], "table_ori": [["Fiscal Years", "Operating   Leases"], ["2011", "$21,871"], ["2012", "12,322"], ["2013", "9,078"], ["2014", "6,381"], ["2015", "5,422"], ["Later Years", "30,655"], ["Total", "$85,729"]]}

Question: what was the average percentage that the lease expenses decreased from 2011 to 2013
Evidence:
table_1: fiscal years the 2011 of operating leases is $ 21871 ;
table_2: fiscal years the 2012 of operating leases is 12322 ;
table_3: fiscal years the 2013 of operating leases is 9078 ;
text_4: the company does not believe that any current legal matters will have a material adverse effect on the company 2019s financial position , results of operations or cash flows .
Program: subtract(21871, 12322), divide(#0, 21871), subtract(12322, 9078), divide(#2, 12322), add(#3, #1), divide(#4, const_2)
Answer:
str_answer: 35%
exe_answer: 0.34994