{"pre_text": ["apply as it has no impact on plan obligations .", "for 2015 , the healthcare trend rate was 7% ( 7 % ) , the ultimate trend rate was 5% ( 5 % ) , and the year the ultimate trend rate is reached was 2019 .", "projected benefit payments are as follows: ."], "post_text": ["these estimated benefit payments are based on assumptions about future events .", "actual benefit payments may vary significantly from these estimates .", "17 .", "commitments and contingencies litigation we are involved in various legal proceedings , including commercial , competition , environmental , health , safety , product liability , and insurance matters .", "in september 2010 , the brazilian administrative council for economic defense ( cade ) issued a decision against our brazilian subsidiary , air products brasil ltda. , and several other brazilian industrial gas companies for alleged anticompetitive activities .", "cade imposed a civil fine of r$ 179.2 million ( approximately $ 55 at 30 september 2016 ) on air products brasil ltda .", "this fine was based on a recommendation by a unit of the brazilian ministry of justice , whose investigation began in 2003 , alleging violation of competition laws with respect to the sale of industrial and medical gases .", "the fines are based on a percentage of our total revenue in brazil in 2003 .", "we have denied the allegations made by the authorities and filed an appeal in october 2010 with the brazilian courts .", "on 6 may 2014 , our appeal was granted and the fine against air products brasil ltda .", "was dismissed .", "cade has appealed that ruling and the matter remains pending .", "we , with advice of our outside legal counsel , have assessed the status of this matter and have concluded that , although an adverse final judgment after exhausting all appeals is possible , such a judgment is not probable .", "as a result , no provision has been made in the consolidated financial statements .", "we estimate the maximum possible loss to be the full amount of the fine of r$ 179.2 million ( approximately $ 55 at 30 september 2016 ) plus interest accrued thereon until final disposition of the proceedings .", "other than this matter , we do not currently believe there are any legal proceedings , individually or in the aggregate , that are reasonably possible to have a material impact on our financial condition , results of operations , or cash flows .", "environmental in the normal course of business , we are involved in legal proceedings under the comprehensive environmental response , compensation , and liability act ( cercla : the federal superfund law ) ; resource conservation and recovery act ( rcra ) ; and similar state and foreign environmental laws relating to the designation of certain sites for investigation or remediation .", "presently , there are approximately 33 sites on which a final settlement has not been reached where we , along with others , have been designated a potentially responsible party by the environmental protection agency or are otherwise engaged in investigation or remediation , including cleanup activity at certain of our current and former manufacturing sites .", "we continually monitor these sites for which we have environmental exposure .", "accruals for environmental loss contingencies are recorded when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated .", "the consolidated balance sheets at 30 september 2016 and 2015 included an accrual of $ 81.4 and $ 80.6 , respectively , primarily as part of other noncurrent liabilities .", "the environmental liabilities will be paid over a period of up to 30 years .", "we estimate the exposure for environmental loss contingencies to range from $ 81 to a reasonably possible upper exposure of $ 95 as of 30 september 2016. ."], "table": [["2017", "$ 11.5"], ["2018", "11.0"], ["2019", "10.7"], ["2020", "10.2"], ["2021", "9.7"], ["2022 20132026", "35.3"]], "table_ori": [["2017", "$11.5"], ["2018", "11.0"], ["2019", "10.7"], ["2020", "10.2"], ["2021", "9.7"], ["2022–2026", "35.3"]]}

Question: considering the years 2019-2020 , what was the decrease observed in the projected benefit payments?
Evidence:
table_2: 2017 the 2019 of $ 11.5 is 10.7 ;
table_3: 2017 the 2020 of $ 11.5 is 10.2 ;
Program: divide(10.2, 10.7), subtract(#0, const_1), multiply(#1, const_100)
Answer:
str_answer: 4.67%
exe_answer: -4.6729