Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.


entergy corporation and subsidiaries notes to financial statements this difference as a regulatory asset or liability on an ongoing basis , resulting in a zero net balance for the regulatory asset at the end of the lease term . the amount was a net regulatory liability of $ 61.6 million and $ 27.8 million as of december 31 , 2013 and 2012 , respectively . as of december 31 , 2013 , system energy had future minimum lease payments ( reflecting an implicit rate of 5.13% ( 5.13 % ) ) , which are recorded as long-term debt , as follows : amount ( in thousands ) . <table class='wikitable'><tr><td>1</td><td>-</td><td>amount ( in thousands )</td></tr><tr><td>2</td><td>2014</td><td>$ 51637</td></tr><tr><td>3</td><td>2015</td><td>52253</td></tr><tr><td>4</td><td>2016</td><td>13750</td></tr><tr><td>5</td><td>2017</td><td>13750</td></tr><tr><td>6</td><td>2018</td><td>13750</td></tr><tr><td>7</td><td>years thereafter</td><td>247500</td></tr><tr><td>8</td><td>total</td><td>392640</td></tr><tr><td>9</td><td>less : amount representing interest</td><td>295226</td></tr><tr><td>10</td><td>present value of net minimum lease payments</td><td>$ 97414</td></tr></table> .
Question: what were the future minimum lease payments in 2016?
Answer: 52253.0
Question: and what were they in 2015?
Answer: 13750.0
Question: what was, then, the change over the year?

38503.0