edwards lifesciences corporation notes to consolidated financial statements ( continued ) 12 . employee benefit plans ( continued ) equity and debt securities are valued at fair value based on quoted market prices reported on the active markets on which the individual securities are traded . the insurance contracts are valued at the cash surrender value of the contracts , which is deemed to approximate its fair value . the following benefit payments , which reflect expected future service , as appropriate , at december 31 , 2016 , are expected to be paid ( in millions ) : .

$ 4.5: 2018: 4
2019: 4
2020: 4.6
2021: 4.5
2021-2025: 44.6

as of december 31 , 2016 , expected employer contributions for 2017 are $ 6.1 million . defined contribution plans the company 2019s employees in the united states and puerto rico are eligible to participate in a qualified defined contribution plan . in the united states , participants may contribute up to 25% ( 25 % ) of their eligible compensation ( subject to tax code limitation ) to the plan . edwards lifesciences matches the first 3% ( 3 % ) of the participant 2019s annual eligible compensation contributed to the plan on a dollar-for-dollar basis . edwards lifesciences matches the next 2% ( 2 % ) of the participant 2019s annual eligible compensation to the plan on a 50% ( 50 % ) basis . in puerto rico , participants may contribute up to 25% ( 25 % ) of their annual compensation ( subject to tax code limitation ) to the plan . edwards lifesciences matches the first 4% ( 4 % ) of participant 2019s annual eligible compensation contributed to the plan on a 50% ( 50 % ) basis . the company also provides a 2% ( 2 % ) profit sharing contribution calculated on eligible earnings for each employee . matching contributions relating to edwards lifesciences employees were $ 17.3 million , $ 15.3 million , and $ 12.8 million in 2016 , 2015 , and 2014 , respectively . the company also has nonqualified deferred compensation plans for a select group of employees . the plans provide eligible participants the opportunity to defer eligible compensation to future dates specified by the participant with a return based on investment alternatives selected by the participant . the amount accrued under these nonqualified plans was $ 46.7 million and $ 35.5 million at december 31 , 2016 and 2015 , respectively . 13 . common stock treasury stock in july 2014 , the board of directors approved a stock repurchase program authorizing the company to purchase up to $ 750.0 million of the company 2019s common stock . in november 2016 , the board of directors approved a new stock repurchase program providing for an additional $ 1.0 billion of repurchases of our common stock . the repurchase programs do not have an expiration date . stock repurchased under these programs may be used to offset obligations under the company 2019s employee stock-based benefit programs and stock-based business acquisitions , and will reduce the total shares outstanding . during 2016 , 2015 , and 2014 , the company repurchased 7.3 million , 2.6 million , and 4.4 million shares , respectively , at an aggregate cost of $ 662.3 million , $ 280.1 million , and $ 300.9 million , respectively , including .

Questions:
what was the change in the total of matching contributions from 2014 to 2016?
and how much does this change represent in relation to those contributions in 2014, in percentage?
and between the two years subsequent to that period, what was the change in the benefits expected to be paid?
what was this change as a percentage of those benefits in 2017?

Answers:
4.5
35%
-0.5
11%