{"pre_text": ["112 / sl green realty corp .", "2017 annual report 20 .", "commitments and contingencies legal proceedings as of december a031 , 2017 , the company and the operating partnership were not involved in any material litigation nor , to management 2019s knowledge , was any material litigation threat- ened against us or our portfolio which if adversely determined could have a material adverse impact on us .", "environmental matters our management believes that the properties are in compliance in all material respects with applicable federal , state and local ordinances and regulations regarding environmental issues .", "management is not aware of any environmental liability that it believes would have a materially adverse impact on our financial position , results of operations or cash flows .", "management is unaware of any instances in which it would incur significant envi- ronmental cost if any of our properties were sold .", "employment agreements we have entered into employment agreements with certain exec- utives , which expire between december a02018 and february a02020 .", "the minimum cash-based compensation , including base sal- ary and guaranteed bonus payments , associated with these employment agreements total $ 5.4 a0million for 2018 .", "in addition these employment agreements provide for deferred compen- sation awards based on our stock price and which were valued at $ 1.6 a0million on the grant date .", "the value of these awards may change based on fluctuations in our stock price .", "insurance we maintain 201call-risk 201d property and rental value coverage ( includ- ing coverage regarding the perils of flood , earthquake and terrorism , excluding nuclear , biological , chemical , and radiological terrorism ( 201cnbcr 201d ) ) , within three property insurance programs and liability insurance .", "separate property and liability coverage may be purchased on a stand-alone basis for certain assets , such as the development of one vanderbilt .", "additionally , our captive insurance company , belmont insurance company , or belmont , pro- vides coverage for nbcr terrorist acts above a specified trigger , although if belmont is required to pay a claim under our insur- ance policies , we would ultimately record the loss to the extent of belmont 2019s required payment .", "however , there is no assurance that in the future we will be able to procure coverage at a reasonable cost .", "further , if we experience losses that are uninsured or that exceed policy limits , we could lose the capital invested in the damaged properties as well as the anticipated future cash flows from those plan trustees adopted a rehabilitation plan consistent with this requirement .", "no surcharges have been paid to the pension plan as of december a031 , 2017 .", "for the pension plan years ended june a030 , 2017 , 2016 , and 2015 , the plan received contributions from employers totaling $ 257.8 a0million , $ 249.5 a0million , and $ 221.9 a0million .", "our contributions to the pension plan represent less than 5.0% ( 5.0 % ) of total contributions to the plan .", "the health plan was established under the terms of collective bargaining agreements between the union , the realty advisory board on labor relations , inc .", "and certain other employees .", "the health plan provides health and other benefits to eligible participants employed in the building service industry who are covered under collective bargaining agreements , or other writ- ten agreements , with the union .", "the health plan is administered by a board of trustees with equal representation by the employ- ers and the union and operates under employer identification number a013-2928869 .", "the health plan receives contributions in accordance with collective bargaining agreements or participa- tion agreements .", "generally , these agreements provide that the employers contribute to the health plan at a fixed rate on behalf of each covered employee .", "for the health plan years ended , june a030 , 2017 , 2016 , and 2015 , the plan received contributions from employers totaling $ 1.3 a0billion , $ 1.2 a0billion and $ 1.1 a0billion , respectively .", "our contributions to the health plan represent less than 5.0% ( 5.0 % ) of total contributions to the plan .", "contributions we made to the multi-employer plans for the years ended december a031 , 2017 , 2016 and 2015 are included in the table below ( in thousands ) : ."], "post_text": ["401 ( k ) plan in august a01997 , we implemented a 401 ( k ) a0savings/retirement plan , or the 401 ( k ) a0plan , to cover eligible employees of ours , and any designated affiliate .", "the 401 ( k ) a0plan permits eligible employees to defer up to 15% ( 15 % ) of their annual compensation , subject to certain limitations imposed by the code .", "the employees 2019 elective deferrals are immediately vested and non-forfeitable upon contribution to the 401 ( k ) a0plan .", "during a02003 , we amended our 401 ( k ) a0plan to pro- vide for discretionary matching contributions only .", "for 2017 , 2016 and 2015 , a matching contribution equal to 50% ( 50 % ) of the first 6% ( 6 % ) of annual compensation was made .", "for the year ended december a031 , 2017 , we made a matching contribution of $ 728782 .", "for the years ended december a031 , 2016 and 2015 , we made matching contribu- tions of $ 566000 and $ 550000 , respectively. ."], "table": [["benefit plan", "2017", "2016", "2015"], ["pension plan", "$ 3856", "$ 3979", "$ 2732"], ["health plan", "11426", "11530", "8736"], ["other plans", "1463", "1583", "5716"], ["total plan contributions", "$ 16745", "$ 17092", "$ 17184"]], "table_ori": [["Benefit Plan", "2017", "2016", "2015"], ["Pension Plan", "$3,856", "$3,979", "$2,732"], ["Health Plan", "11,426", "11,530", "8,736"], ["Other plans", "1,463", "1,583", "5,716"], ["Total plan contributions", "$16,745", "$17,092", "$17,184"]]}

Question: what was the percentage increase in the pension plan contributions from 2015 to 2016
Evidence:
text_16: for the pension plan years ended june a030 , 2017 , 2016 , and 2015 , the plan received contributions from employers totaling $ 257.8 a0million , $ 249.5 a0million , and $ 221.9 a0million .
Program: subtract(249.5, 221.9), divide(#0, 221.9)
Answer:
str_answer: 12.4%
exe_answer: 0.12438